Infomotions, Inc.The Jargon File, Version 4.0.0, 24 Jul 1996 / Various

Author: Various
Title: The Jargon File, Version 4.0.0, 24 Jul 1996
Date: 1997-02-10
Contributor(s):
Size: 1294105
Identifier: etext817
Language: en
Publisher: Project Gutenberg
Rights: GNU General Public License
Tag(s): hackers program term unix august various jargon file version jul project gutenberg
Versions: original; local mirror; plain HTML (this file);
concordance (most frequent 100 words, etc.)
Related: Alex Catalogue of Electronic Texts
Share:


*The Project Gutenberg Etext of The Jargon File, Version 4.0.0*
*You can find an older version as Etext #38, in August of 1992*


Copyright laws are changing all over the world, be sure to check
the copyright laws for your country before posting these files!!

Please take a look at the important information in this header.
We encourage you to keep this file on your own disk, keeping an
electronic path open for the next readers.  Do not remove this.


**Welcome To The World of Free Plain Vanilla Electronic Texts**

**Etexts Readable By Both Humans and By Computers, Since 1971**

*These Etexts Prepared By Hundreds of Volunteers and Donations*

Information on contacting Project Gutenberg to get Etexts, and
further information is included below.  We need your donations.


The Jargon File, Version 4.0.0*


February, 1997  [Etext #817]  [See Etext #38 for older version]


*The Project Gutenberg Etext of The Jargon File, Version 4.0.0*
*****This file should be named jarg400.txt or jarg400.zip******


This file maintained by Eric Raymond esr@snark.thyrsus.com
or contact jargon@snark.thyrsus.com


We are now trying to release all our books one month in advance
of the official release dates, for time for better editing.

Please note:  neither this list nor its contents are final till
midnight of the last day of the month of any such announcement.
The official release date of all Project Gutenberg Etexts is at
Midnight, Central Time, of the last day of the stated month.  A
preliminary version may often be posted for suggestion, comment
and editing by those who wish to do so.  To be sure you have an
up to date first edition [xxxxx10x.xxx] please check file sizes
in the first week of the next month.  Since our ftp program has
a bug in it that scrambles the date [tried to fix and failed] a
look at the file size will have to do, but we will try to see a
new copy has at least one byte more or less.


Information about Project Gutenberg (one page)

We produce about two million dollars for each hour we work.  The
fifty hours is one conservative estimate for how long it we take
to get any etext selected, entered, proofread, edited, copyright
searched and analyzed, the copyright letters written, etc.  This
projected audience is one hundred million readers.  If our value
per text is nominally estimated at one dollar then we produce $2
million dollars per hour this year as we release thirty-two text
files per month:  or 400 more Etexts in 1996 for a total of 800.
If these reach just 10% of the computerized population, then the
total should reach 80 billion Etexts.  We will try add 800 more,
during 1997, but it will take all the effort we can manage to do
the doubling of our library again this year, what with the other
massive requirements it is going to take to get incorporated and
establish something that will have some permanence.

The Goal of Project Gutenberg is to Give Away One Trillion Etext
Files by the December 31, 2001.  [10,000 x 100,000,000=Trillion]
This is ten thousand titles each to one hundred million readers,
which is only 10% of the present number of computer users.  2001
should have at least twice as many computer users as that, so it
will require us reaching less than 5% of the users in 2001.


We need your donations more than ever!


All donations should be made to "Project Gutenberg"


For these and other matters, please mail to:

Project Gutenberg
P. O. Box  2782
Champaign, IL 61825

When all other email fails try our Executive Director:
Michael S. Hart <hart@pobox.com>

We would prefer to send you this information by email
(Internet, Bitnet, Compuserve, ATTMAIL or MCImail).

******
If you have an FTP program (or emulator), please
FTP directly to the Project Gutenberg archives:
[Mac users, do NOT point and click. . .type]

ftp uiarchive.cso.uiuc.edu
login:  anonymous
password:  your@login
cd etext/etext90 through /etext97
or cd etext/articles [get suggest gut for more information]
dir [to see files]
get or mget [to get files. . .set bin for zip files]
GET INDEX?00.GUT
for a list of books
and
GET NEW GUT for general information
and
MGET GUT* for newsletters.

**Information prepared by the Project Gutenberg legal advisor**
(Three Pages)


***START**THE SMALL PRINT!**FOR PUBLIC DOMAIN ETEXTS**START***
Why is this "Small Print!" statement here?  You know: lawyers.
They tell us you might sue us if there is something wrong with
your copy of this etext, even if you got it for free from
someone other than us, and even if what's wrong is not our
fault.  So, among other things, this "Small Print!" statement
disclaims most of our liability to you.  It also tells you how
you can distribute copies of this etext if you want to.

*BEFORE!* YOU USE OR READ THIS ETEXT
By using or reading any part of this PROJECT GUTENBERG-tm
etext, you indicate that you understand, agree to and accept
this "Small Print!" statement.  If you do not, you can receive
a refund of the money (if any) you paid for this etext by
sending a request within 30 days of receiving it to the person
you got it from.  If you received this etext on a physical
medium (such as a disk), you must return it with your request.

ABOUT PROJECT GUTENBERG-TM ETEXTS
This PROJECT GUTENBERG-tm etext, like most PROJECT GUTENBERG-
tm etexts, is a "public domain" work distributed by Professor
Michael S. Hart through the Project Gutenberg (the "Project").
Among other things, this means that no one owns a United States
copyright on or for this work, so the Project (and you!) can copy
and distribute it in the United States without permission and
without paying copyright royalties.  Special rules, set forth
below, apply if you wish to copy and distribute this etext
under the Project's "PROJECT GUTENBERG" trademark.

To create these etexts, the Project expends considerable
efforts to identify, transcribe and proofread public domain
works.  Despite these efforts, the Project's etexts and any
medium they may be on may contain "Defects".  Among other
things, Defects may take the form of incomplete, inaccurate or
corrupt data, transcription errors, a copyright or other
intellectual property infringement, a defective or damaged
disk or other etext medium, a computer virus, or computer
codes that damage or cannot be read by your equipment.

LIMITED WARRANTY; DISCLAIMER OF DAMAGES
But for the "Right of Replacement or Refund" described below,
[1] the Project (and any other party you may receive this
etext from as a PROJECT GUTENBERG-tm etext) disclaims all
liability to you for damages, costs and expenses, including
legal fees, and [2] YOU HAVE NO REMEDIES FOR NEGLIGENCE OR
UNDER STRICT LIABILITY, OR FOR BREACH OF WARRANTY OR CONTRACT,
INCLUDING BUT NOT LIMITED TO INDIRECT, CONSEQUENTIAL, PUNITIVE
OR INCIDENTAL DAMAGES, EVEN IF YOU GIVE NOTICE OF THE
POSSIBILITY OF SUCH DAMAGES.

If you discover a Defect in this etext within 90 days of
receiving it, you can receive a refund of the money (if any)
you paid for it by sending an explanatory note within that
time to the person you received it from.  If you received it
on a physical medium, you must return it with your note, and
such person may choose to alternatively give you a replacement
copy.  If you received it electronically, such person may
choose to alternatively give you a second opportunity to
receive it electronically.

THIS ETEXT IS OTHERWISE PROVIDED TO YOU "AS-IS".  NO OTHER
WARRANTIES OF ANY KIND, EXPRESS OR IMPLIED, ARE MADE TO YOU AS
TO THE ETEXT OR ANY MEDIUM IT MAY BE ON, INCLUDING BUT NOT
LIMITED TO WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE.

Some states do not allow disclaimers of implied warranties or
the exclusion or limitation of consequential damages, so the
above disclaimers and exclusions may not apply to you, and you
may have other legal rights.

INDEMNITY
You will indemnify and hold the Project, its directors,
officers, members and agents harmless from all liability, cost
and expense, including legal fees, that arise directly or
indirectly from any of the following that you do or cause:
[1] distribution of this etext, [2] alteration, modification,
or addition to the etext, or [3] any Defect.

DISTRIBUTION UNDER "PROJECT GUTENBERG-tm"
You may distribute copies of this etext electronically, or by
disk, book or any other medium if you either delete this
"Small Print!" and all other references to Project Gutenberg,
or:

[1]  Only give exact copies of it.  Among other things, this
     requires that you do not remove, alter or modify the
     etext or this "small print!" statement.  You may however,
     if you wish, distribute this etext in machine readable
     binary, compressed, mark-up, or proprietary form,
     including any form resulting from conversion by word pro-
     cessing or hypertext software, but only so long as
     *EITHER*:

     [*]  The etext, when displayed, is clearly readable, and
          does *not* contain characters other than those
          intended by the author of the work, although tilde
          (~), asterisk (*) and underline (_) characters may
          be used to convey punctuation intended by the
          author, and additional characters may be used to
          indicate hypertext links; OR

     [*]  The etext may be readily converted by the reader at
          no expense into plain ASCII, EBCDIC or equivalent
          form by the program that displays the etext (as is
          the case, for instance, with most word processors);
          OR

     [*]  You provide, or agree to also provide on request at
          no additional cost, fee or expense, a copy of the
          etext in its original plain ASCII form (or in EBCDIC
          or other equivalent proprietary form).

[2]  Honor the etext refund and replacement provisions of this
     "Small Print!" statement.

[3]  Pay a trademark license fee to the Project of 20% of the
     net profits you derive calculated using the method you
     already use to calculate your applicable taxes.  If you
     don't derive profits, no royalty is due.  Royalties are
     payable to "Project Gutenberg Association within the 60
     days following each date you prepare (or were legally
     required to prepare) your annual (or equivalent periodic)
     tax return.

WHAT IF YOU *WANT* TO SEND MONEY EVEN IF YOU DON'T HAVE TO?
The Project gratefully accepts contributions in money, time,
scanning machines, OCR software, public domain etexts, royalty
free copyright licenses, and every other sort of contribution
you can think of.  Money should be paid to "Project Gutenberg
Association".

*END*THE SMALL PRINT! FOR PUBLIC DOMAIN ETEXTS*Ver.04.29.93*END*





The preface has gotten so long an intertwined that we moved it to the end
for the Project Gutenberg Etext of the Jargon file.  You can find it by a
search for the following line:





#======= THIS IS THE JARGON FILE, VERSION  4.0.0,  24 JUL 1996 =======#


The Jargon Lexicon
******************

= A =
=====

:abbrev: /*-breev'/, /*-brev'/ /n./  Common abbreviation for
   `abbreviation'.

:ABEND: /a'bend/, /*-bend'/ /n./  [ABnormal END] Abnormal
   termination (of software); {crash}; {lossage}.  Derives from
   an error message on the IBM 360; used jokingly by hackers but
   seriously mainly by {code grinder}s.  Usually capitalized, but
   may appear as `abend'.  Hackers will try to persuade you that
   ABEND is called `abend' because it is what system operators do to
   the machine late on Friday when they want to call it a day, and
   hence is from the German `Abend' = `Evening'.

:accumulator: /n. obs./  1. Archaic term for a register.  On-line
   use of it as a synonym for `register' is a fairly reliable
   indication that the user has been around for quite a while and/or
   that the architecture under discussion is quite old.  The term in
   full is almost never used of microprocessor registers, for example,
   though symbolic names for arithmetic registers beginning in `A'
   derive from historical use of the term `accumulator' (and not,
   actually, from `arithmetic').  Confusingly, though, an `A'
   register name prefix may also stand for `address', as for
   example on the Motorola 680x0 family.  2. A register being used for
   arithmetic or logic (as opposed to addressing or a loop index),
   especially one being used to accumulate a sum or count of many
   items.  This use is in context of a particular routine or stretch
   of code.  "The FOOBAZ routine uses A3 as an accumulator."
   3. One's in-basket (esp. among old-timers who might use sense 1).
   "You want this reviewed?  Sure, just put it in the accumulator."
   (See {stack}.)

:ACK: /ak/ /interj./  1. [from the ASCII mnemonic for 0000110]
   Acknowledge.  Used to register one's presence (compare mainstream
   *Yo!*).  An appropriate response to {ping} or {ENQ}.
   2. [from the comic strip "Bloom County"] An exclamation of
   surprised disgust, esp. in "Ack pffft!"  Semi-humorous.
   Generally this sense is not spelled in caps (ACK) and is
   distinguished by a following exclamation point.  3. Used to
   politely interrupt someone to tell them you understand their point
   (see {NAK}).  Thus, for example, you might cut off an overly
   long explanation with "Ack.  Ack.  Ack.  I get it now".

   There is also a usage "ACK?" (from sense 1) meaning "Are you
   there?", often used in email when earlier mail has produced no
   reply, or during a lull in {talk mode} to see if the person has
   gone away (the standard humorous response is of course {NAK}
   (sense 2), i.e., "I'm not here").

:Acme: /n./  The canonical supplier of bizarre, elaborate, and
   non-functional gadgetry -- where Rube Goldberg and Heath Robinson
   shop.  Describing some X as an "Acme X" either means "This is
   {insanely great}", or, more likely, "This looks {insanely
   great} on paper, but in practice it's really easy to shoot yourself
   in the foot with it."  Compare {pistol}.

   This term, specially cherished by American hackers and explained
   here for the benefit of our overseas brethren, comes from the
   Warner Brothers' series of "Roadrunner" cartoons.  In these
   cartoons, the famished Wile E. Coyote was forever attempting to
   catch up with, trap, and eat the Roadrunner.  His attempts usually
   involved one or more high-technology Rube Goldberg devices --
   rocket jetpacks, catapults, magnetic traps, high-powered
   slingshots, etc.  These were usually delivered in large cardboard
   boxes, labeled prominently with the Acme name.  These devices
   invariably malfunctioned in violent and improbable ways.

:acolyte: /n. obs./  [TMRC] An {OSU} privileged enough to
   submit data and programs to a member of the {priesthood}.

:ad-hockery: /ad-hok'*r-ee/ /n./  [Purdue] 1. Gratuitous
   assumptions made inside certain programs, esp. expert systems,
   which lead to the appearance of semi-intelligent behavior but are
   in fact entirely arbitrary.  For example, fuzzy-matching of
   input tokens that might be typing errors against a symbol table can
   make it look as though a program knows how to spell.
   2. Special-case code to cope with some awkward input that would
   otherwise cause a program to {choke}, presuming normal inputs
   are dealt with in some cleaner and more regular way.  Also called
   `ad-hackery', `ad-hocity' (/ad-hos'*-tee/), `ad-crockery'.
   See also {ELIZA effect}.

:Ada:: /n./  A {{Pascal}}-descended language that has been made
   mandatory for Department of Defense software projects by the
   Pentagon.  Hackers are nearly unanimous in observing that,
   technically, it is precisely what one might expect given that kind
   of endorsement by fiat; designed by committee, crockish, difficult
   to use, and overall a disastrous, multi-billion-dollar boondoggle
   (one common description is "The PL/I of the 1980s").  Hackers
   find Ada's exception-handling and inter-process communication
   features particularly hilarious.  Ada Lovelace (the daughter of
   Lord Byron who became the world's first programmer while
   cooperating with Charles Babbage on the design of his mechanical
   computing engines in the mid-1800s) would almost certainly blanch
   at the use to which her name has latterly been put; the kindest
   thing that has been said about it is that there is probably a good
   small language screaming to get out from inside its vast,
   {elephantine} bulk.

:adger: /aj'r/ /vt./  [UCLA mutant of {nadger}, poss. from
   the middle name of an infamous {tenured graduate student}] To
   make a bonehead move with consequences that could have been
   foreseen with even slight mental effort.  E.g., "He started
   removing files and promptly adgered the whole project".  Compare
   {dumbass attack}.

:admin: /ad-min'/ /n./  Short for `administrator'; very
   commonly used in speech or on-line to refer to the systems person
   in charge on a computer.  Common constructions on this include
   `sysadmin' and `site admin' (emphasizing the administrator's
   role as a site contact for email and news) or `newsadmin'
   (focusing specifically on news).  Compare {postmaster},
   {sysop}, {system mangler}.

:ADVENT: /ad'vent/ /n./  The prototypical computer adventure
   game, first designed by Will Crowther on the {PDP-10} in the
   mid-1970s as an attempt at computer-refereed fantasy gaming, and
   expanded into a puzzle-oriented game by Don Woods at Stanford in
   1976.  Now better known as Adventure, but the {{TOPS-10}}
   operating system permitted only six-letter filenames.  See also
   {vadding}, {Zork}, and {Infocom}.

   This game defined the terse, dryly humorous style since expected in
   text adventure games, and popularized several tag lines that have
   become fixtures of hacker-speak: "A huge green fierce snake bars
   the way!"  "I see no X here" (for some noun X).  "You are in a
   maze of twisty little passages, all alike."  "You are in a little
   maze of twisty passages, all different."  The `magic words'
   {xyzzy} and {plugh} also derive from this game.

   Crowther, by the way, participated in the exploration of the
   Mammoth & Flint Ridge cave system; it actually *has* a
   `Colossal Cave' and a `Bedquilt' as in the game, and the `Y2' that
   also turns up is cavers' jargon for a map reference to a secondary
   entrance.

:AFAIK: // /n./ [Usenet] Abbrev. for "As Far As I Know".

:AFJ: // /n./  Written-only abbreviation for "April Fool's
   Joke".  Elaborate April Fool's hoaxes are a long-established
   tradition on Usenet and Internet; see {kremvax} for an example.
   In fact, April Fool's Day is the *only* seasonal holiday
   consistently marked by customary observances on Internet and other
   hacker networks.

:AI: /A-I/ /n./  Abbreviation for `Artificial Intelligence',
   so common that the full form is almost never written or spoken
   among hackers.

:AI-complete: /A-I k*m-pleet'/ /adj./  [MIT, Stanford: by
   analogy with `NP-complete' (see {NP-})] Used to describe
   problems or subproblems in AI, to indicate that the solution
   presupposes a solution to the `strong AI problem' (that is, the
   synthesis of a human-level intelligence).  A problem that is
   AI-complete is, in other words, just too hard.

   Examples of AI-complete problems are `The Vision Problem'
   (building a system that can see as well as a human) and `The
   Natural Language Problem' (building a system that can understand
   and speak a natural language as well as a human).  These may appear
   to be modular, but all attempts so far (1996) to solve them have
   foundered on the amount of context information and `intelligence'
   they seem to require. See also {gedanken}.

:AI koans: /A-I koh'anz/ /pl.n./  A series of pastiches of Zen
   teaching riddles created by Danny Hillis at the MIT AI Lab around
   various major figures of the Lab's culture (several are included
   under {AI Koans} in Appendix A).  See also {ha ha
   only serious}, {mu}, and {{hacker humor}}.

:AIDS: /aydz/ /n./  Short for A* Infected Disk Syndrome (`A*'
   is a {glob} pattern that matches, but is not limited to, Apple
   or Amiga), this condition is quite often the result of practicing
   unsafe {SEX}.  See {virus}, {worm}, {Trojan horse},
   {virgin}.

:AIDX: /ayd'k*z/ /n./  Derogatory term for IBM's perverted
   version of Unix, AIX, especially for the AIX 3.? used in the IBM
   RS/6000 series (some hackers think it is funnier just to pronounce
   "AIX" as "aches").  A victim of the dreaded "hybridism"
   disease, this attempt to combine the two main currents of the Unix
   stream ({BSD} and {USG Unix}) became a {monstrosity} to
   haunt system administrators' dreams.  For example, if new accounts
   are created while many users are logged on, the load average jumps
   quickly over 20 due to silly implementation of the user databases.
   For a quite similar disease, compare {HP-SUX}.  Also, compare
   {Macintrash}, {Nominal Semidestructor}, {Open DeathTrap},
   {ScumOS}, {sun-stools}.

:airplane rule: /n./  "Complexity increases the possibility of
   failure; a twin-engine airplane has twice as many engine problems
   as a single-engine airplane."  By analogy, in both software and
   electronics, the rule that simplicity increases robustness.  It is
   correspondingly argued that the right way to build reliable systems
   is to put all your eggs in one basket, after making sure that
   you've built a really *good* basket.  See also {KISS
   Principle}.

:aliasing bug: /n./  A class of subtle programming errors that
   can arise in code that does dynamic allocation, esp. via
   `malloc(3)' or equivalent.  If several pointers address
   (`aliases for') a given hunk of storage, it may happen that the
   storage is freed or reallocated (and thus moved) through one alias
   and then referenced through another, which may lead to subtle (and
   possibly intermittent) lossage depending on the state and the
   allocation history of the malloc {arena}.  Avoidable by use of
   allocation strategies that never alias allocated core, or by use of
   higher-level languages, such as {LISP}, which employ a garbage
   collector (see {GC}).  Also called a {stale pointer bug}.
   See also {precedence lossage}, {smash the stack},
   {fandango on core}, {memory leak}, {memory smash},
   {overrun screw}, {spam}.

   Historical note: Though this term is nowadays associated with
   C programming, it was already in use in a very similar sense in the
   Algol-60 and FORTRAN communities in the 1960s.

:all-elbows: /adj./  [MS-DOS] Of a TSR
   (terminate-and-stay-resident) IBM PC program, such as the N
   pop-up calendar and calculator utilities that circulate on {BBS}
   systems: unsociable.  Used to describe a program that rudely steals
   the resources that it needs without considering that other TSRs may
   also be resident.  One particularly common form of rudeness is
   lock-up due to programs fighting over the keyboard interrupt.  See
   {rude}, also {mess-dos}.

:alpha particles: /n./  See {bit rot}.

:alt: /awlt/  1. /n./ The alt shift key on an IBM PC or
   {clone} keyboard; see {bucky bits}, sense 2 (though typical
   PC usage does not simply set the 0200 bit).  2. /n./ The `clover'
   or `Command' key on a Macintosh; use of this term usually reveals
   that the speaker hacked PCs before coming to the Mac (see also
   {feature key}).  Some Mac hackers, confusingly, reserve `alt'
   for the Option key (and it is so labeled on some Mac II keyboards).
   3. /n.,obs/.  [PDP-10; often capitalized to ALT] Alternate name for
   the ASCII ESC character (ASCII 0011011), after the keycap labeling
   on some older terminals; also `altmode' (/awlt'mohd/).  This
   character was almost never pronounced `escape' on an ITS system,
   in {TECO}, or under TOPS-10 -- always alt, as in "Type alt alt
   to end a TECO command" or "alt-U onto the system" (for "log
   onto the [ITS] system").  This usage probably arose because alt is
   more convenient to say than `escape', especially when followed by
   another alt or a character (or another alt *and* a character,
   for that matter).  4. The alt hierarchy on Usenet, the tree of
   newsgroups created by users without a formal vote and approval
   procedure.  There is a myth, not entirely implausible, that
   alt is acronymic for "anarchists, lunatics, and terrorists";
   but in fact it is simply short for "alternative".

:alt bit: /awlt bit/ [from alternate] /adj./  See {meta
   bit}.

:altmode: /n./ Syn. {alt} sense 3.

:Aluminum Book: /n./  [MIT] "Common LISP: The Language", by
   Guy L.  Steele Jr. (Digital Press, first edition 1984, second
   edition 1990).  Note that due to a technical screwup some printings
   of the second edition are actually of a color the author describes
   succinctly as "yucky green".  See also {{book titles}}.

:amoeba: /n./  Humorous term for the Commodore Amiga personal
   computer.

:amp off: /vt./  [Purdue] To run in {background}.  From the
   Unix shell `&' operator.

:amper: /n./  Common abbreviation for the name of the ampersand
   (`&', ASCII 0100110) character.  See {{ASCII}} for other synonyms.

:angle brackets: /n./  Either of the characters `<' (ASCII
   0111100) and `>' (ASCII 0111110) (ASCII less-than or
   greater-than signs).  Typographers in the {Real World} use angle
   brackets which are either taller and slimmer (the ISO `Bra' and
   `Ket' characters), or significantly smaller (single or double
   guillemets) than the less-than and greater-than signs.
   See {broket}, {{ASCII}}.

:angry fruit salad: /n./  A bad visual-interface design that
   uses too many colors.  (This term derives, of course, from the
   bizarre day-glo colors found in canned fruit salad.)  Too often one
   sees similar effects from interface designers using color window
   systems such as {X}; there is a tendency to create displays that
   are flashy and attention-getting but uncomfortable for long-term
   use.

:annoybot: /*-noy-bot/ /n./  [IRC] See {robot}.

:ANSI: /an'see/  1. /n./ [techspeak] The American National
   Standards Institute. ANSI, along with the International
Organization
   for Standards (ISO), standardized the C programming language (see
   {K&R}, {Classic C}), and promulgates many other important
   software standards.  2. /n./ [techspeak] A terminal may be said to
be
   `ANSI' if it meets the ANSI X.364 standard for terminal control.
   Unfortunately, this standard was both over-complicated and too
   permissive.  It has been retired and replaced by the ECMA-48
   standard, which shares both flaws.  3. /n./ [BBS jargon] The set of
   screen-painting codes that most MS-DOS and Amiga computers accept.
   This comes from the ANSI.SYS device driver that must be loaded on
   an MS-DOS computer to view such codes.  Unfortunately, neither DOS
   ANSI nor the BBS ANSIs derived from it exactly match the ANSI X.364
   terminal standard.  For example, the ESC-[1m code turns on the bold
   highlight on large machines, but in IBM PC/MS-DOS ANSI, it turns on
   `intense' (bright) colors.  Also, in BBS-land, the term `ANSI' is
   often used to imply that a particular computer uses or can emulate
   the IBM high-half character set from MS-DOS.  Particular use
   depends on context. Occasionally, the vanilla ASCII character set
   is used with the color codes, but on BBSs, ANSI and `IBM
   characters' tend to go together.

:AOS: 1. /aws/ (East Coast), /ay'os/ (West Coast) /vt. obs./ 
   To increase the amount of something. "AOS the campfire."
   [based on a PDP-10 increment instruction] Usage:
   considered silly, and now obsolete.  Now largely supplanted by
   {bump}.  See {SOS}.  2. /n./ A {{Multics}}-derived OS
   supported at one time by Data General.  This was pronounced
   /A-O-S/ or /A-os/.  A spoof of the standard AOS system
   administrator's manual ("How to Load and Generate your AOS
   System") was created, issued a part number, and circulated as
   photocopy folklore; it was called "How to Goad and Levitate
   your CHAOS System".  3. /n./ Algebraic Operating System, in
reference
   to those calculators which use infix instead of postfix (reverse
   Polish) notation.  4. A {BSD}-like operating system for the IBM
   RT.

   Historical note: AOS in sense 1 was the name of a {PDP-10}
   instruction that took any memory location in the computer and added
   1 to it; AOS meant `Add One and do not Skip'.  Why, you may ask,
   does the `S' stand for `do not Skip' rather than for `Skip'?  Ah,
   here was a beloved piece of PDP-10 folklore.  There were eight such
   instructions: AOSE added 1 and then skipped the next instruction
   if the result was Equal to zero; AOSG added 1 and then skipped if
   the result was Greater than 0; AOSN added 1 and then skipped
   if the result was Not 0; AOSA added 1 and then skipped Always;
   and so on.  Just plain AOS didn't say when to skip, so it never
   skipped.

   For similar reasons, AOJ meant `Add One and do not Jump'.  Even
   more bizarre, SKIP meant `do not SKIP'!  If you wanted to skip the
   next instruction, you had to say `SKIPA'.  Likewise, JUMP meant
   `do not JUMP'; the unconditional form was JUMPA.  However, hackers
   never did this.  By some quirk of the 10's design, the {JRST}
   (Jump and ReSTore flag with no flag specified) was actually faster
   and so was invariably used.  Such were the perverse mysteries of
   assembler programming.

:app: /ap/ /n./  Short for `application program', as opposed
   to a systems program.  Apps are what systems vendors are forever
   chasing developers to create for their environments so they can
   sell more boxes.  Hackers tend not to think of the things they
   themselves run as apps; thus, in hacker parlance the term excludes
   compilers, program editors, games, and messaging systems, though a
   user would consider all those to be apps.  (Broadly, an app is
   often a self-contained environment for performing some well-defined
   task such as `word processing'; hackers tend to prefer more
   general-purpose tools.) See {killer app}; oppose {tool},
   {operating system}.

:arena: [Unix] /n./  The area of memory attached to a process by
   `brk(2)' and `sbrk(2)' and used by `malloc(3)' as
   dynamic storage.  So named from a `malloc: corrupt arena'
   message emitted when some early versions detected an impossible
   value in the free block list.  See {overrun screw}, {aliasing
   bug}, {memory leak}, {memory smash}, {smash the stack}.

:arg: /arg/ /n./  Abbreviation for `argument' (to a
   function), used so often as to have become a new word (like
   `piano' from `pianoforte').  "The sine function takes 1 arg,
   but the arc-tangent function can take either 1 or 2 args."
   Compare {param}, {parm}, {var}.

:ARMM: /n./  [acronym, `Automated Retroactive Minimal
   Moderation'] A Usenet robot created by Dick Depew of Munroe Falls,
   Ohio.  ARMM was intended to automatically cancel posts from
   anonymous-posting sites.  Unfortunately, the robot's recognizer for
   anonymous postings triggered on its own automatically-generated
   control messages!  Transformed by this stroke of programming
   ineptitude into a monster of Frankensteinian proportions, it broke
   loose on the night of March 31, 1993 and proceeded to {spam}
   news.admin.policy with a recursive explosion of over 200
   messages.

   ARMM's bug produced a recursive {cascade} of messages each of which
   mechanically added text to the ID and Subject and some other
   headers of its parent.  This produced a flood of messages in which
   each header took up several screens and each message ID and subject
   line got longer and longer and longer.

   Reactions varied from amusement to outrage.  The pathological
   messages crashed at least one mail system, and upset people paying
   line charges for their Usenet feeds.  One poster described the ARMM
   debacle as "instant Usenet history" (also establishing the term
   {despew}), and it has since been widely cited as a cautionary
   example of the havoc the combination of good intentions and
   incompetence can wreak on a network.  Compare {Great Worm, the};
   {sorcerer's apprentice mode}.  See also {software laser},
   {network meltdown}.

:armor-plated: /n./ Syn. for {bulletproof}.

:asbestos: /adj./  Used as a modifier to anything intended to
   protect one from {flame}s; also in other highly
   {flame}-suggestive usages.  See, for example, {asbestos
   longjohns} and {asbestos cork award}.

:asbestos cork award: /n./  Once, long ago at MIT, there was a
   {flamer} so consistently obnoxious that another hacker designed,
   had made, and distributed posters announcing that said flamer had
   been nominated for the `asbestos cork award'.  (Any reader in
   doubt as to the intended application of the cork should consult the
   etymology under {flame}.)  Since then, it is agreed that only a
   select few have risen to the heights of bombast required to earn
   this dubious dignity -- but there is no agreement on *which*
   few.

:asbestos longjohns: /n./  Notional garments donned by
   {Usenet} posters just before emitting a remark they expect will
   elicit {flamage}.  This is the most common of the {asbestos}
   coinages.  Also `asbestos underwear', `asbestos overcoat', etc.

:ASCII:: /as'kee/ /n./  [acronym: American Standard Code for
   Information Interchange] The predominant character set encoding of
   present-day computers.  The modern version uses 7 bits for each
   character, whereas most earlier codes (including an early version
   of ASCII) used fewer.  This change allowed the inclusion of
   lowercase letters -- a major {win} -- but it did not provide
   for accented letters or any other letterforms not used in English
   (such as the German sharp-S
   or the ae-ligature
   which is a letter in, for example, Norwegian).  It could be worse,
   though.  It could be much worse.  See {{EBCDIC}} to understand how.

   Computers are much pickier and less flexible about spelling than
   humans; thus, hackers need to be very precise when talking about
   characters, and have developed a considerable amount of verbal
   shorthand for them.  Every character has one or more names -- some
   formal, some concise, some silly.  Common jargon names for ASCII
   characters are collected here.  See also individual entries for
   {bang}, {excl}, {open}, {ques}, {semi}, {shriek},
   {splat}, {twiddle}, and {Yu-Shiang Whole Fish}.

   This list derives from revision 2.3 of the Usenet ASCII
   pronunciation guide.  Single characters are listed in ASCII order;
   character pairs are sorted in by first member.  For each character,
   common names are given in rough order of popularity, followed by
   names that are reported but rarely seen; official ANSI/CCITT names
   are surrounded by brokets: <>.  Square brackets mark the
   particularly silly names introduced by {INTERCAL}.  The
   abbreviations "l/r" and "o/c" stand for left/right and
   "open/close" respectively.  Ordinary parentheticals provide some
   usage information.

!
     Common: {bang}; pling; excl; shriek; <exclamation mark>.  Rare:
     factorial; exclam; smash; cuss; boing; yell; wow; hey; wham;
     eureka; [spark-spot]; soldier.

"
     Common: double quote; quote.  Rare: literal mark; double-glitch;
     <quotation marks>; <dieresis>; dirk; [rabbit-ears]; double prime.

#
     Common: number sign; pound; pound sign; hash; sharp; {crunch};
     hex; [mesh].  Rare: grid; crosshatch; octothorpe; flash;
     <square>, pig-pen; tictactoe; scratchmark; thud; thump; {splat}.

$
     Common: dollar; <dollar sign>.  Rare: currency symbol; buck;
     cash; string (from BASIC); escape (when used as the echo of ASCII
     ESC); ding; cache; [big money].

%
     Common: percent; <percent sign>; mod; grapes.  Rare:
     [double-oh-seven].

&
     Common: <ampersand>; amper; and.  Rare: address (from C);
     reference (from C++); andpersand; bitand; background (from
     `sh(1)'); pretzel; amp.  [INTERCAL called this `ampersand'; what
     could be sillier?]

'
     Common: single quote; quote; <apostrophe>.  Rare: prime; glitch;
     tick; irk; pop; [spark]; <closing single quotation mark>; <acute
     accent>.

( )

     Common: l/r paren; l/r parenthesis; left/right; open/close;
     paren/thesis; o/c paren; o/c parenthesis; l/r parenthesis; l/r
     banana.  Rare: so/already; lparen/rparen; <opening/closing
     parenthesis>; o/c round bracket, l/r round bracket, [wax/wane];
     parenthisey/unparenthisey; l/r ear.

*
     Common: star; [{splat}]; <asterisk>.  Rare: wildcard; gear;
     dingle; mult; spider; aster; times; twinkle; glob (see {glob});
     {Nathan Hale}.

+
     Common: <plus>; add.  Rare: cross; [intersection].

,
     Common: <comma>.  Rare: <cedilla>; [tail].

-
     Common: dash; <hyphen>; <minus>.  Rare: [worm]; option; dak;
     bithorpe.

.
     Common: dot; point; <period>; <decimal point>.  Rare: radix
     point; full stop; [spot].

/
     Common: slash; stroke; <slant>; forward slash.  Rare: diagonal;
     solidus; over; slak; virgule; [slat].

:
     Common: <colon>.  Rare: dots; [two-spot].

;
     Common: <semicolon>; semi.  Rare: weenie; [hybrid], pit-thwong.

< >
     Common: <less/greater than>; bra/ket; l/r angle; l/r angle
     bracket; l/r broket.  Rare: from/{into, towards}; read from/write
     to; suck/blow; comes-from/gozinta; in/out; crunch/zap (all from
     UNIX); [angle/right angle].

=
     Common: <equals>; gets; takes.  Rare: quadrathorpe; [half-mesh].

?
     Common: query; <question mark>; {ques}.  Rare: whatmark; [what];
     wildchar; huh; hook; buttonhook; hunchback.

@
     Common: at sign; at; strudel.  Rare: each; vortex; whorl;
     [whirlpool]; cyclone; snail; ape; cat; rose; cabbage; <commercial
     at>.

V
     Rare: [book].

[ ]
     Common: l/r square bracket; l/r bracket; <opening/closing
     bracket>; bracket/unbracket.  Rare: square/unsquare; [U turn/U
     turn back].

\
     Common: backslash; escape (from C/UNIX); reverse slash; slosh;
     backslant; backwhack.  Rare: bash; <reverse slant>; reversed
     virgule; [backslat].

^
     Common: hat; control; uparrow; caret; <circumflex>.  Rare:
     chevron; [shark (or shark-fin)]; to the (`to the power of');
     fang; pointer (in Pascal).

_
     Common: <underline>; underscore; underbar; under.  Rare: score;
     backarrow; skid; [flatworm].

`
     Common: backquote; left quote; left single quote; open quote;
     <grave accent>; grave.  Rare: backprime; [backspark];
     unapostrophe; birk; blugle; back tick; back glitch; push;
     <opening single quotation mark>; quasiquote.

{ }
     Common: o/c brace; l/r brace; l/r squiggly; l/r squiggly
     bracket/brace; l/r curly bracket/brace; <opening/closing brace>.
     Rare: brace/unbrace; curly/uncurly; leftit/rytit; l/r squirrelly;
     [embrace/bracelet].

|
     Common: bar; or; or-bar; v-bar; pipe; vertical bar.  Rare:
     <vertical line>; gozinta; thru; pipesinta (last three from UNIX);
     [spike].

~
     Common: <tilde>; squiggle; {twiddle}; not.  Rare: approx; wiggle;
     swung dash; enyay; [sqiggle (sic)].

   The pronunciation of `#' as `pound' is common in the U.S.
   but a bad idea; {{Commonwealth Hackish}} has its own, rather more
   apposite use of `pound sign' (confusingly, on British keyboards
   the pound graphic
   happens to replace `#'; thus Britishers sometimes
   call `#' on a U.S.-ASCII keyboard `pound', compounding the
   American error).  The U.S. usage derives from an old-fashioned
   commercial practice of using a `#' suffix to tag pound weights
   on bills of lading.  The character is usually pronounced `hash'
   outside the U.S.  There are more culture wars over the correct
   pronunciation of this character than any other, which has led to
   the {ha ha only serious} suggestion that it be pronounced
   `shibboleth' (see Judges 12.6 in a Christian Bible).

   The `uparrow' name for circumflex and `leftarrow' name for
   underline are historical relics from archaic ASCII (the 1963
   version), which had these graphics in those character positions
   rather than the modern punctuation characters.

   The `swung dash' or `approximation' sign is not quite the same
   as tilde in typeset material
   but the ASCII tilde serves for both (compare {angle
   brackets}).

   Some other common usages cause odd overlaps.  The `#',
   `$', `>', and `&' characters, for example, are all
   pronounced "hex" in different communities because various
   assemblers use them as a prefix tag for hexadecimal constants (in
   particular, `#' in many assembler-programming cultures,
   `$' in the 6502 world, `>' at Texas Instruments, and
   `&' on the BBC Micro, Sinclair, and some Z80 machines).  See
   also {splat}.

   The inability of ASCII text to correctly represent any of the
   world's other major languages makes the designers' choice of 7 bits
   look more and more like a serious {misfeature} as the use of
   international networks continues to increase (see {software
   rot}).  Hardware and software from the U.S. still tends to embody
   the assumption that ASCII is the universal character set and that
   characters have 7 bits; this is a a major irritant to people who
   want to use a character set suited to their own languages.
   Perversely, though, efforts to solve this problem by proliferating
   `national' character sets produce an evolutionary pressure to use
   a *smaller* subset common to all those in use.

:ASCII art: /n./  The fine art of drawing diagrams using the
   ASCII character set (mainly `|', `-', `/', `\',
   and `+').  Also known as `character graphics' or `ASCII
   graphics'; see also {boxology}.  Here is a serious
   example:

         o----)||(--+--|<----+   +---------o + D O
           L  )||(  |        |   |             C U
         A I  )||(  +-->|-+  |   +-\/\/-+--o -   T
         C N  )||(        |  |   |      |        P
           E  )||(  +-->|-+--)---+--)|--+-o      U
              )||(  |        |          | GND    T
         o----)||(--+--|<----+----------+     

         A power supply consisting of a full wave rectifier circuit
         feeding a capacitor input filter circuit

   And here are some very silly examples:

       |\/\/\/|     ____/|              ___    |\_/|    ___
       |      |     \ o.O|   ACK!      /   \_  |` '|  _/   \
       |      |      =(_)=  THPHTH!   /      \/     \/      \
       | (o)(o)        U             /                       \
       C      _)  (__)                \/\/\/\  _____  /\/\/\/
       | ,___|    (oo)                       \/     \/
       |   /       \/-------\         U                  (__)
      /____\        ||     | \    /---V  `v'-            oo )
     /      \       ||---W||  *  * |--|   || |`.         |_/\

                    //-o-\\
             ____---=======---____
         ====___\   /.. ..\   /___====      Klingons rule OK!
       //        ---\__O__/---        \\
       \_\                           /_/

   There is an important subgenre of ASCII art that puns on the
   standard character names in the fashion of a rebus.

     +--------------------------------------------------------+
     |      ^^^^^^^^^^^^                                      |
     | ^^^^^^^^^^^            ^^^^^^^^^                       |
     |                 ^^^^^^^^^^^^^            ^^^^^^^^^^^^^ |
     |        ^^^^^^^         B       ^^^^^^^^^               |
     |  ^^^^^^^^^          ^^^            ^^^^^^^^^^^^^^      |
     +--------------------------------------------------------+
                  " A Bee in the Carrot Patch "

   Within humorous ASCII art, there is for some reason an entire
   flourishing subgenre of pictures of silly cows.  Four of these are
   reproduced in the silly examples above, here are three more:

              (__)              (__)              (__)
              (\/)              ($$)              (**)
       /-------\/        /-------\/        /-------\/
      / | 666 ||        / |=====||        / |     ||
     *  ||----||       *  ||----||       *  ||----||
        ~~    ~~          ~~    ~~          ~~    ~~ 
     Satanic cow    This cow is a Yuppie   Cow in love

Finally, here's a magnificent example of ASCII art depicting an
Edwardian train station in Dunedin, New Zealand:

                                       .-.
                                      /___\
                                      |___|
                                      |]_[|
                                      / I \
                                   JL/  |  \JL
        .-.                    i   ()   |   ()   i                    .-.
        |_|     .^.           /_\  LJ=======LJ  /_\           .^.     |_|
     ._/___\._./___\_._._._._.L_J_/.-.     .-.\_L_J._._._._._/___\._./___\._._._
            ., |-,-| .,       L_J  |_| [I] |_|  L_J       ., |-,-| .,        ., 
            JL |-O-| JL       L_J%%%%%%%%%%%%%%%L_J       JL |-O-| JL        JL 
     IIIIII_HH_'-'-'_HH_IIIIII|_|=======H=======|_|IIIIII_HH_'-'-'_HH_IIIIII_HH_
     -------[]-------[]-------[_]----\.=I=./----[_]-------[]-------[]--------[]-
      _/\_  ||\\_I_//||  _/\_ [_] []_/_L_J_\_[] [_] _/\_  ||\\_I_//||  _/\_  ||\
      |__|  ||=/_|_\=||  |__|_|_|   _L_L_J_J_   |_|_|__|  ||=/_|_\=||  |__|  ||-
      |__|  |||__|__|||  |__[___]__--__===__--__[___]__|  |||__|__|||  |__|  |||
     IIIIIII[_]IIIII[_]IIIIIL___J__II__|_|__II__L___JIIIII[_]IIIII[_]IIIIIIII[_]
      \_I_/ [_]\_I_/[_] \_I_[_]\II/[]\_\I/_/[]\II/[_]\_I_/ [_]\_I_/[_] \_I_/ [_]
     ./   \.L_J/   \L_J./   L_JI  I[]/     \[]I  IL_J    \.L_J/   \L_J./   \.L_J
     |     |L_J|   |L_J|    L_J|  |[]|     |[]|  |L_J     |L_J|   |L_J|     |L_J
     |_____JL_JL___JL_JL____|-||  |[]|     |[]|  ||-|_____JL_JL___JL_JL_____JL_J

   There is a newsgroup, alt.ascii.art, devoted to this
   genre; however, see also {warlording}.

:ASCIIbetical order: /as'kee-be'-t*-kl or'dr/ /adj.,n./  Used
   to indicate that data is sorted in ASCII collated order rather than
   alphabetical order.  This lexicon is sorted in something close to
   ASCIIbetical order, but with case ignored and entries beginning
   with non-alphabetic characters moved to the end.

:atomic: /adj./  [from Gk. `atomos', indivisible]
   1. Indivisible; cannot be split up.  For example, an instruction
   may be said to do several things `atomically', i.e., all the
   things are done immediately, and there is no chance of the
   instruction being half-completed or of another being interspersed.
   Used esp. to convey that an operation cannot be screwed up by
   interrupts.  "This routine locks the file and increments the
   file's semaphore atomically."  2. [primarily techspeak] Guaranteed
   to complete successfully or not at all, usu. refers to database
   transactions.  If an error prevents a partially-performed
   transaction from proceeding to completion, it must be "backed out,"
   as the database must not be left in an inconsistent state.

   Computer usage, in either of the above senses, has none of the
   connotations that `atomic' has in mainstream English (i.e.  of
   particles of matter, nuclear explosions etc.).

:attoparsec: /n./  About an inch.  `atto-' is the standard SI
   prefix for multiplication by 10^(-18).  A parsec
   (parallax-second) is 3.26 light-years; an attoparsec is thus
   3.26 * 10^(-18) light years, or about 3.1 cm (thus, 1
   attoparsec/{microfortnight} equals about 1 inch/sec).  This unit
   is reported to be in use (though probably not very seriously) among
   hackers in the U.K.  See {micro-}.

:autobogotiphobia: /aw'toh-boh-got`*-foh'bee-*/  /n./ See
   {bogotify}.

:automagically: /aw-toh-maj'i-klee/ /adv./  Automatically, but
   in a way that, for some reason (typically because it is too
   complicated, or too ugly, or perhaps even too trivial), the speaker
   doesn't feel like explaining to you.  See {magic}.  "The
   C-INTERCAL compiler generates C, then automagically invokes
   `cc(1)' to produce an executable."

   This term is quite old, going back at least to the mid-70s and
   probably much earlier.  The word `automagic' occurred in
advertising
   (for a shirt-ironing gadget) as far back as the late 1940s.

:avatar: /n./ Syn.  1. Among people working on virtual reality
   and {cyberspace} interfaces, an "avatar" is an icon or
   representation of a user in a shared virtual reality.  The term is
   sometimes used on {MUD}s.  2. [CMU, Tektronix] {root},
   {superuser}.  There are quite a few Unix machines on which the
   name of the superuser account is `avatar' rather than `root'.
   This quirk was originated by a CMU hacker who disliked the term
   `superuser', and was propagated through an ex-CMU hacker at
   Tektronix.

:awk: /awk/  1. /n./ [Unix techspeak] An interpreted language
   for massaging text data developed by Alfred Aho, Peter Weinberger,
   and Brian Kernighan (the name derives from their initials).  It is
   characterized by C-like syntax, a declaration-free approach to
   variable typing and declarations, associative arrays, and
   field-oriented text processing.  See also {Perl}.  2. n.
   Editing term for an expression awkward to manipulate through normal
   {regexp} facilities (for example, one containing a
   {newline}).  3. /vt./ To process data using `awk(1)'.

= B =
=====

:back door: /n./  A hole in the security of a system
   deliberately left in place by designers or maintainers.  The
   motivation for such holes is not always sinister; some operating
   systems, for example, come out of the box with privileged accounts
   intended for use by field service technicians or the vendor's
   maintenance programmers.  Syn. {trap door}; may also be called a
   `wormhole'.  See also {iron box}, {cracker}, {worm},
   {logic bomb}.

   Historically, back doors have often lurked in systems longer than
   anyone expected or planned, and a few have become widely known.
   Ken Thompson's 1983 Turing Award lecture to the ACM admitted the
   existence of a back door in early Unix versions that may have
   qualified as the most fiendishly clever security hack of all time.
   In this scheme, the C compiler contained code that would recognize
   when the `login' command was being recompiled and insert some
   code recognizing a password chosen by Thompson, giving him entry to
   the system whether or not an account had been created for him.

   Normally such a back door could be removed by removing it from the
   source code for the compiler and recompiling the compiler.  But to
   recompile the compiler, you have to *use* the compiler -- so
   Thompson also arranged that the compiler would *recognize when
   it was compiling a version of itself*, and insert into the
   recompiled compiler the code to insert into the recompiled
   `login' the code to allow Thompson entry -- and, of course, the
   code to recognize itself and do the whole thing again the next time
   around!  And having done this once, he was then able to recompile
   the compiler from the original sources; the hack perpetuated itself
   invisibly, leaving the back door in place and active but with no
   trace in the sources.

   The talk that suggested this truly moby hack was published as
   "Reflections on Trusting Trust", "Communications of the ACM
   27", 8 (August 1984), pp. 761--763 (text available at
   http://www.acm.org/classics).  Ken Thompson has since
   confirmed that this hack was implemented and that the Trojan Horse
   code did appear in the login binary of a Unix Support group
   machine.  Ken says the crocked compiler was never distributed.
   Your editor has heard two separate reports that suggest that the
   crocked login did make it out of Bell Labs, notably to BBN, and
   that it enabled at least one late-night login across the network by
   someone using the login name `kt'.

:backbone cabal: /n./  A group of large-site administrators who
   pushed through the {Great Renaming} and reined in the chaos of
   {Usenet} during most of the 1980s.  The cabal {mailing list}
   disbanded in late 1988 after a bitter internal catfight.

:backbone site: /n./  A key Usenet and email site; one that
   processes a large amount of third-party traffic, especially if it
   is the home site of any of the regional coordinators for the Usenet
   maps.  Notable backbone sites as of early 1993, when this sense of
   the term was beginning to pass out of general use due to wide
   availability of cheap Internet connections, included uunet and
   the mail machines at Rutgers University, UC Berkeley, {DEC}'s
   Western Research Laboratories, Ohio State University, and the
   University of Texas.  Compare {rib site}, {leaf site}.

   [1996 update: This term is seldom heard any more.  The UUCP network
   world that gave it meaning has nearly disappeared; everyone is on
   the Internet now and network traffic is distributed in very
   different patterns. --ESR]

:backgammon::  See {bignum} (sense 3), {moby} (sense 4),
   and {pseudoprime}.

:background: /n.,adj.,vt./  To do a task `in background' is to
   do it whenever {foreground} matters are not claiming your
   undivided attention, and `to background' something means to
   relegate it to a lower priority.  "For now, we'll just print a
   list of nodes and links; I'm working on the graph-printing problem
   in background."  Note that this implies ongoing activity but at a
   reduced level or in spare time, in contrast to mainstream `back
   burner' (which connotes benign neglect until some future resumption
   of activity).  Some people prefer to use the term for processing
   that they have queued up for their unconscious minds (a tack that
   one can often fruitfully take upon encountering an obstacle in
   creative work).  Compare {amp off}, {slopsucker}.

   Technically, a task running in background is detached from the
   terminal where it was started (and often running at a lower
   priority); oppose {foreground}.  Nowadays this term is primarily
   associated with {{Unix}}, but it appears to have been first used
   in this sense on OS/360.

:backspace and overstrike: /interj./  Whoa!  Back up.  Used to
   suggest that someone just said or did something wrong.  Common
   among APL programmers.

:backward combatability: /bak'w*rd k*m-bat'*-bil'*-tee/ /n./ 
   [CMU, Tektronix: from `backward compatibility'] A property of
   hardware or software revisions in which previous protocols,
   formats, layouts, etc. are irrevocably discarded in favor of `new
   and improved' protocols, formats, and layouts, leaving the previous
   ones not merely deprecated but actively defeated.  (Too often, the
   old and new versions cannot definitively be distinguished, such
   that lingering instances of the previous ones yield crashes or
   other infelicitous effects, as opposed to a simple "version
   mismatch" message.)  A backwards compatible change, on the other
   hand, allows old versions to coexist without crashes or error
   messages, but too many major changes incorporating elaborate
   backwards compatibility processing can lead to extreme {software
   bloat}.  See also {flag day}.

:BAD: /B-A-D/ /adj./  [IBM: acronym, `Broken As Designed']
   Said of a program that is {bogus} because of bad design and
   misfeatures rather than because of bugginess.  See {working as
   designed}.

:Bad Thing: /n./  [from the 1930 Sellar & Yeatman parody "1066
   And All That"] Something that can't possibly result in
   improvement of the subject.  This term is always capitalized, as in
   "Replacing all of the 9600-baud modems with bicycle couriers would
   be a Bad Thing".  Oppose {Good Thing}.  British correspondents
   confirm that {Bad Thing} and {Good Thing} (and prob.
   therefore {Right Thing} and {Wrong Thing}) come from the book
   referenced in the etymology, which discusses rulers who were Good
   Kings but Bad Things.  This has apparently created a mainstream
   idiom on the British side of the pond.

:bag on the side: /n./  [prob. originally related to a
   colostomy bag] An extension to an established hack that
   is supposed to add some functionality to the original.  Usually
   derogatory, implying that the original was being overextended and
   should have been thrown away, and the new product is ugly,
   inelegant, or bloated.  Also /v./ phrase, `to hang a bag on the
side
   [of]'.  "C++?  That's just a bag on the side of C ...."
   "They want me to hang a bag on the side of the accounting
   system."

:bagbiter: /bag'bi:t-*r/ /n./  1. Something, such as a program
   or a computer, that fails to work, or works in a remarkably clumsy
   manner.  "This text editor won't let me make a file with a line
   longer than 80 characters!  What a bagbiter!"  2. A person who has
   caused you some trouble, inadvertently or otherwise, typically by
   failing to program the computer properly.  Synonyms: {loser},
   {cretin}, {chomper}.  3. `bite the bag' /vi./ To fail in some
   manner.  "The computer keeps crashing every five minutes."
   "Yes, the disk controller is really biting the bag."  The
   original loading of these terms was almost undoubtedly obscene,
   possibly referring to the scrotum, but in their current usage they
   have become almost completely sanitized.

   ITS's `lexiphage' program was the first and to date only known
   example of a program *intended* to be a bagbiter.

:bagbiting: /adj./  Having the quality of a {bagbiter}.
   "This bagbiting system won't let me compute the factorial of a
   negative number."  Compare {losing}, {cretinous},
   {bletcherous}, `barfucious' (under {barfulous}) and
   `chomping' (under {chomp}).

:balloonian variable: /n./  [Commodore users; perh. a deliberate
   phonetic mangling of `boolean variable'?] Any variable that
   doesn't actually hold or control state, but must nevertheless be
   declared, checked, or set.  A typical balloonian variable started
   out as a flag attached to some environment feature that either
   became obsolete or was planned but never implemented.
   Compatibility concerns (or politics attached to same) may require
   that such a flag be treated as though it were {live}.

:bamf: /bamf/  1. [from X-Men comics; originally "bampf"]
   /interj./ Notional sound made by a person or object teleporting in
or
   out of the hearer's vicinity.  Often used in {virtual reality}
   (esp. {MUD}) electronic {fora} when a character wishes to
   make a dramatic entrance or exit.  2. The sound of magical
   transformation, used in virtual reality {fora} like MUDs. 3. In
   MUD circles, "bamf" is also used to refer to the act by which a
   MUD server sends a special notification to the MUD client to switch
   its connection to another server ("I'll set up the old site to
   just bamf people over to our new location.").  4. Used by MUDders
   on occasion in a more general sense related to sense 3, to refer to
   directing someone to another location or resource ("A user was
   asking about some technobabble so I bamfed them to
   http://www.ccil.org/jargon/jargon.html.")

:banana label: /n./  The labels often used on the sides of
   {macrotape} reels, so called because they are shaped roughly
   like blunt-ended bananas.  This term, like macrotapes themselves,
   is still current but visibly headed for obsolescence.

:banana problem: /n./  [from the story of the little girl who
   said "I know how to spell `banana', but I don't know when to
   stop"].  Not knowing where or when to bring a production to a
   close (compare {fencepost error}).  One may say `there is a
   banana problem' of an algorithm with poorly defined or incorrect
   termination conditions, or in discussing the evolution of a design
   that may be succumbing to featuritis (see also {creeping
   elegance}, {creeping featuritis}).  See item 176 under
   {HAKMEM}, which describes a banana problem in a {Dissociated
   Press} implementation.  Also, see {one-banana problem} for a
   superficially similar but unrelated usage.

:bandwidth: /n./  1. Used by hackers (in a generalization of its
   technical meaning) as the volume of information per unit time that
   a computer, person, or transmission medium can handle.  "Those are
   amazing graphics, but I missed some of the detail -- not enough
   bandwidth, I guess."  Compare {low-bandwidth}.  2. Attention
   span.  3. On {Usenet}, a measure of network capacity that is
   often wasted by people complaining about how items posted by others
   are a waste of bandwidth.

:bang:  1. /n./ Common spoken name for `!' (ASCII 0100001),
   especially when used in pronouncing a {bang path} in spoken
   hackish.  In {elder days} this was considered a CMUish usage,
   with MIT and Stanford hackers preferring {excl} or {shriek};
   but the spread of Unix has carried `bang' with it (esp. via the
   term {bang path}) and it is now certainly the most common spoken
   name for `!'.  Note that it is used exclusively for
   non-emphatic written `!'; one would not say "Congratulations
   bang" (except possibly for humorous purposes), but if one wanted
   to specify the exact characters `foo!' one would speak "Eff oh oh
   bang".  See {shriek}, {{ASCII}}.  2. /interj./ An exclamation
   signifying roughly "I have achieved enlightenment!", or "The
   dynamite has cleared out my brain!"  Often used to acknowledge
   that one has perpetrated a {thinko} immediately after one has
   been called on it.

:bang on: /vt./  To stress-test a piece of hardware or software:
   "I banged on the new version of the simulator all day yesterday
   and it didn't crash once.  I guess it is ready for release."  The
   term {pound on} is synonymous.

:bang path: /n./  An old-style UUCP electronic-mail address
   specifying hops to get from some assumed-reachable location to the
   addressee, so called because each {hop} is signified by a
   {bang} sign.  Thus, for example, the path
   ...!bigsite!foovax!barbox!me directs people to route their mail
   to machine bigsite (presumably a well-known location accessible
   to everybody) and from there through the machine foovax to the
   account of user me on barbox.

   In the bad old days of not so long ago, before autorouting mailers
   became commonplace, people often published compound bang addresses
   using the { } convention (see {glob}) to give paths from
   *several* big machines, in the hopes that one's correspondent
   might be able to get mail to one of them reliably (example:
   ...!{seismo, ut-sally, ihnp4}!rice!beta!gamma!me).  Bang paths
   of 8 to 10 hops were not uncommon in 1981.  Late-night dial-up
   UUCP links would cause week-long transmission times.  Bang paths
   were often selected by both transmission time and reliability, as
   messages would often get lost.  See {{Internet address}},
   {network, the}, and {sitename}.

:banner: /n./  1. The title page added to printouts by most
   print spoolers (see {spool}).  Typically includes user or
   account ID information in very large character-graphics capitals.
   Also called a `burst page', because it indicates where to burst
   (tear apart) fanfold paper to separate one user's printout from the
   next.  2. A similar printout generated (typically on multiple pages
   of fan-fold paper) from user-specified text, e.g., by a program
   such as Unix's `banner({1,6})'.  3. On interactive software,
   a first screen containing a logo and/or author credits and/or a
   copyright notice.

:bar: /bar/ /n./  1. The second {metasyntactic variable},
   after {foo} and before {baz}.  "Suppose we have two
   functions: FOO and BAR.  FOO calls BAR...." 2. Often
   appended to {foo} to produce {foobar}.

:bare metal: /n./  1. New computer hardware, unadorned with such
   snares and delusions as an {operating system}, an {HLL}, or
   even assembler.  Commonly used in the phrase `programming on the
   bare metal', which refers to the arduous work of {bit bashing}
   needed to create these basic tools for a new machine.  Real
   bare-metal programming involves things like building boot proms and
   BIOS chips, implementing basic monitors used to test device
   drivers, and writing the assemblers that will be used to write the
   compiler back ends that will give the new machine a real
   development environment.  2. `Programming on the bare metal' is
   also used to describe a style of {hand-hacking} that relies on
   bit-level peculiarities of a particular hardware design, esp.
   tricks for speed and space optimization that rely on crocks such as
   overlapping instructions (or, as in the famous case described in
   {The Story of Mel, a Real Programmer} (in Appendix A),
   interleaving of opcodes on a magnetic drum to minimize fetch delays
   due to the device's rotational latency).  This sort of thing has
   become less common as the relative costs of programming time and
   machine resources have changed, but is still found in heavily
   constrained environments such as industrial embedded systems, and
   in the code of hackers who just can't let go of that low-level
   control.  See {Real Programmer}.

   In the world of personal computing, bare metal programming
   (especially in sense 1 but sometimes also in sense 2) is often
   considered a {Good Thing}, or at least a necessary evil
   (because these machines have often been sufficiently slow and
   poorly designed to make it necessary; see {ill-behaved}).
   There, the term usually refers to bypassing the BIOS or OS
   interface and writing the application to directly access device
   registers and machine addresses.  "To get 19.2 kilobaud on the
   serial port, you need to get down to the bare metal."  People who
   can do this sort of thing well are held in high regard.

:barf: /barf/ /n.,v./  [from mainstream slang meaning `vomit']
   1. /interj./ Term of disgust.  This is the closest hackish
   equivalent of the Valspeak "gag me with a spoon". (Like, euwww!)
   See {bletch}.  2. /vi./ To say "Barf!" or emit some similar
   expression of disgust.  "I showed him my latest hack and he
   barfed" means only that he complained about it, not that he
   literally vomited.  3. /vi./ To fail to work because of
   unacceptable input, perhaps with a suitable error message, perhaps
   not.  Examples: "The division operation barfs if you try to divide
   by 0."  (That is, the division operation checks for an attempt to
   divide by zero, and if one is encountered it causes the operation
   to fail in some unspecified, but generally obvious, manner.) "The
   text editor barfs if you try to read in a new file before writing
   out the old one."  See {choke}, {gag}.  In Commonwealth
   Hackish, `barf' is generally replaced by `puke' or `vom'.
   {barf} is sometimes also used as a {metasyntactic variable},
   like {foo} or {bar}.

:barfmail: /n./  Multiple {bounce message}s accumulating to
   the level of serious annoyance, or worse.  The sort of thing that
   happens when an inter-network mail gateway goes down or wonky.

:barfulation: /bar`fyoo-lay'sh*n/ /interj./  Variation of
   {barf} used around the Stanford area.  An exclamation,
   expressing disgust.  On seeing some particularly bad code one might
   exclaim, "Barfulation!  Who wrote this, Quux?"

:barfulous: /bar'fyoo-l*s/ /adj./  (alt. `barfucious',
   /bar-fyoo-sh*s/) Said of something that would make anyone
   barf, if only for esthetic reasons.

:barney: /n./  In Commonwealth hackish, `barney' is to
   {fred} (sense #1) as {bar} is to {foo}.  That is, people
   who commonly use `fred' as their first metasyntactic variable
   will often use `barney' second.  The reference is, of course, to
   Fred Flintstone and Barney Rubble in the Flintstones cartoons.

:baroque: /adj./  Feature-encrusted; complex; gaudy; verging on
   excessive.  Said of hardware or (esp.) software designs, this has
   many of the connotations of {elephantine} or {monstrosity}
   but is less extreme and not pejorative in itself.  "Metafont even
   has features to introduce random variations to its letterform
   output.  Now *that* is baroque!"  See also {rococo}.

:BASIC: /bay'-sic/ /n./  [acronym: Beginner's All-purpose Symbolic
   Instruction Code] A programming language, originally designed for
   Dartmouth's experimental timesharing system in the early 1960s,
   which has since become the leading cause of brain damage in
   proto-hackers.  Edsger W. Dijkstra observed in "Selected
   Writings on Computing: A Personal Perspective" that "It is
   practically impossible to teach good programming style to students
   that have had prior exposure to BASIC: as potential programmers
   they are mentally mutilated beyond hope of regeneration."  This is
   another case (like {Pascal}) of the cascading lossage that
   happens when a language deliberately designed as an educational toy
   gets taken too seriously.  A novice can write short BASIC programs
   (on the order of 10-20 lines) very easily; writing anything longer
   (a) is very painful, and (b) encourages bad habits that will make
   it harder to use more powerful languages well.  This wouldn't be so
   bad if historical accidents hadn't made BASIC so common on low-end
   micros.  As it is, it ruins thousands of potential wizards a
   year.

   [1995: Some languages called `BASIC' aren't quite this nasty any
   more, having acquired Pascal- and C-like procedures and control
   structures and shed their line numbers. --ESR]

:batch: /adj./  1. Non-interactive.  Hackers use this somewhat
   more loosely than the traditional technical definitions justify; in
   particular, switches on a normally interactive program that prepare
   it to receive non-interactive command input are often referred to
   as `batch mode' switches.  A `batch file' is a series of
   instructions written to be handed to an interactive program running
   in batch mode.  2. Performance of dreary tasks all at one sitting.
   "I finally sat down in batch mode and wrote out checks for all
   those bills; I guess they'll turn the electricity back on next
   week..." 3. `batching up': Accumulation of a number of small
   tasks that can be lumped together for greater efficiency.  "I'm
   batching up those letters to send sometime" "I'm batching up
   bottles to take to the recycling center."

:bathtub curve: /n./  Common term for the curve (resembling an
   end-to-end section of one of those claw-footed antique bathtubs)
   that describes the expected failure rate of electronics with time:
   initially high, dropping to near 0 for most of the system's
   lifetime, then rising again as it `tires out'.  See also
   {burn-in period}, {infant mortality}.

:baud: /bawd/ /n./  [simplified from its technical meaning]
   /n./ Bits per second.  Hence kilobaud or Kbaud, thousands of bits
per
   second.  The technical meaning is `level transitions per
   second'; this coincides with bps only for two-level modulation with
   no framing or stop bits.  Most hackers are aware of these nuances
   but blithely ignore them.

   Historical note: `baud' was originally a unit of telegraph
   signalling speed, set at one pulse per second.  It was proposed at
   the International Telegraph Conference of 1927, and named after
   J.M.E.  Baudot (1845--1903), the French engineer who constructed
   the first successful teleprinter.

:baud barf: /bawd barf/ /n./  The garbage one gets on the
   monitor when using a modem connection with some protocol setting
   (esp. line speed) incorrect, or when someone picks up a voice
   extension on the same line, or when really bad line noise disrupts
   the connection.  Baud barf is not completely {random}, by the
   way; hackers with a lot of serial-line experience can usually tell
   whether the device at the other end is expecting a higher or lower
   speed than the terminal is set to.  *Really* experienced ones
   can identify particular speeds.

:baz: /baz/ /n./  1. The third {metasyntactic variable}
   "Suppose we have three functions: FOO, BAR, and BAZ.  FOO calls
   BAR, which calls BAZ...." (See also {fum}) 2. /interj./ A
   term of mild annoyance.  In this usage the term is often drawn out
   for 2 or 3 seconds, producing an effect not unlike the bleating of
   a sheep; /baaaaaaz/.  3. Occasionally appended to {foo} to
   produce `foobaz'.

   Earlier versions of this lexicon derived `baz' as a Stanford
   corruption of {bar}.  However, Pete Samson (compiler of the
   {TMRC} lexicon) reports it was already current when he joined TMRC
   in 1958.  He says "It came from "Pogo".  Albert the Alligator,
   when vexed or outraged, would shout `Bazz Fazz!' or `Rowrbazzle!'
   The club layout was said to model the (mythical) New England
   counties of Rowrfolk and Bassex (Rowrbazzle mingled with
   (Norfolk/Suffolk/Middlesex/Essex)."

:bboard: /bee'bord/ /n./  [contraction of `bulletin board']
   1. Any electronic bulletin board; esp. used of {BBS} systems
   running on personal micros, less frequently of a Usenet
   {newsgroup} (in fact, use of this term for a newsgroup generally
   marks one either as a {newbie} fresh in from the BBS world or as
   a real old-timer predating Usenet).  2. At CMU and other colleges
   with similar facilities, refers to campus-wide electronic bulletin
   boards.  3. The term `physical bboard' is sometimes used to refer
   to an old-fashioned, non-electronic cork-and-thumbtack memo board.
   At CMU, it refers to a particular one outside the CS Lounge.

   In either of senses 1 or 2, the term is usually prefixed by the
   name of the intended board (`the Moonlight Casino bboard' or
   `market bboard'); however, if the context is clear, the better-read
   bboards may be referred to by name alone, as in (at CMU) "Don't
   post for-sale ads on general".

:BBS: /B-B-S/ /n./  [abbreviation, `Bulletin Board System'] An
   electronic bulletin board system; that is, a message database where
   people can log in and leave broadcast messages for others grouped
   (typically) into {topic group}s.  Thousands of local BBS systems
   are in operation throughout the U.S., typically run by amateurs for
   fun out of their homes on MS-DOS boxes with a single modem line
   each.  Fans of Usenet and Internet or the big commercial
   timesharing bboards such as CompuServe and GEnie tend to consider
   local BBSes the low-rent district of the hacker culture, but they
   serve a valuable function by knitting together lots of hackers and
   users in the personal-micro world who would otherwise be unable to
   exchange code at all.  See also {bboard}.

:beam: /vt./  [from Star Trek Classic's "Beam me up, Scotty!"]
   To transfer {softcopy} of a file electronically; most often
   in combining forms such as `beam me a copy' or `beam that over
   to his site'.  Compare {blast}, {snarf}, {BLT}.

:beanie key: /n./  [Mac users] See {command key}.

:beep: /n.,v./  Syn. {feep}.  This term is techspeak under
   MS-DOS and OS/2, and seems to be generally preferred among micro
   hobbyists.

:beige toaster: /n./  A Macintosh. See {toaster}; compare
   {Macintrash}, {maggotbox}.

:bells and whistles: /n./  [by analogy with the toyboxes on theater
   organs] Features added to a program or system to make it more
   {flavorful} from a hacker's point of view, without necessarily
   adding to its utility for its primary function.  Distinguished from
   {chrome}, which is intended to attract users.  "Now that we've
   got the basic program working, let's go back and add some bells and
   whistles."  No one seems to know what distinguishes a bell from a
   whistle.

:bells, whistles, and gongs: /n./  A standard elaborated form of
   {bells and whistles}; typically said with a pronounced and
   ironic accent on the `gongs'.

:benchmark: [techspeak] /n./  An inaccurate measure of computer
   performance.  "In the computer industry, there are three kinds of
   lies: lies, damn lies, and benchmarks."  Well-known ones include
   Whetstone, Dhrystone, Rhealstone (see {h}), the Gabriel LISP
   benchmarks (see {gabriel}), the SPECmark suite, and LINPACK.
   See also {machoflops}, {MIPS}, {smoke and mirrors}.

:Berkeley Quality Software: /adj./  (often abbreviated `BQS')
   Term used in a pejorative sense to refer to software that was
   apparently created by rather spaced-out hackers late at night to
   solve some unique problem.  It usually has nonexistent, incomplete,
   or incorrect documentation, has been tested on at least two
   examples, and core dumps when anyone else attempts to use it.  This
   term was frequently applied to early versions of the `dbx(1)'
   debugger.  See also {Berzerkeley}.

   Note to British and Commonwealth readers: that's /berk'lee/, not
   /bark'lee/ as in British Received Pronunciation.

:berklix: /berk'liks/ /n.,adj./  [contraction of `Berkeley
   Unix'] See {BSD}.  Not used at Berkeley itself.  May be more
   common among {suit}s attempting to sound like cognoscenti than
   among hackers, who usually just say `BSD'.

:Berzerkeley: /b*r-zer'klee/ /n./  [from `berserk', via the
   name of a now-deceased record label] Humorous distortion of
   `Berkeley' used esp. to refer to the practices or products of the
   {BSD} Unix hackers.  See {software bloat},
   {Missed'em-five}, {Berkeley Quality Software}.

   Mainstream use of this term in reference to the cultural and
   political peculiarities of UC Berkeley as a whole has been reported
   from as far back as the 1960s.

:beta: /bay't*/, /be't*/ or (Commonwealth) /bee't*/ /n./ 
   1. Mostly working, but still under test; usu. used with `in': `in
   beta'.  In the {Real World}, systems (hardware or software)
   software often go through two stages of release testing: Alpha
   (in-house) and Beta (out-house?).  Beta releases are generally made
   to a group of lucky (or unlucky) trusted customers.
   2. Anything that is new and experimental.  "His girlfriend is in
   beta" means that he is still testing for compatibility and
   reserving judgment.  3. Flaky; dubious; suspect (since beta
   software is notoriously buggy).

   Historical note: More formally, to beta-test is to test a
   pre-release (potentially unreliable) version of a piece of software
   by making it available to selected (or self-selected) customers and
   users.  This term derives from early 1960s terminology for product
   cycle checkpoints, first used at IBM but later standard throughout
   the industry.  `Alpha Test' was the unit, module, or component test
   phase; `Beta Test' was initial system test.  These themselves came
   from earlier A- and B-tests for hardware.  The A-test was a
   feasibility and manufacturability evaluation done before any
   commitment to design and development.  The B-test was a
   demonstration that the engineering model functioned as specified.
   The C-test (corresponding to today's beta) was the B-test performed
   on early samples of the production design.

:BFI: /B-F-I/ /n./  See {brute force and ignorance}.  Also
   encountered in the variants `BFMI', `brute force and
   *massive* ignorance' and `BFBI' `brute force and bloody
   ignorance'.

:bible: /n./  1. One of a small number of fundamental source
   books such as {Knuth} and {K&R}.  2. The most detailed and
   authoritative reference for a particular language, operating
   system, or other complex software system.

:BiCapitalization: /n./  The act said to have been performed on
   trademarks (such as {PostScript}, NeXT, {NeWS}, VisiCalc,
   FrameMaker, TK!solver, EasyWriter) that have been raised above the
   ruck of common coinage by nonstandard capitalization.  Too many
   {marketroid} types think this sort of thing is really cute, even
   the 2,317th time they do it.  Compare {studlycaps}.

:B1FF: /bif/ [Usenet] (alt. `BIFF') /n./  The most famous
   {pseudo}, and the prototypical {newbie}.  Articles from B1FF
   feature all uppercase letters sprinkled liberally with bangs,
   typos, `cute' misspellings (EVRY BUDY LUVS GOOD OLD BIFF CUZ
   HE"S A K00L DOOD AN HE RITES REEL AWESUM THINGZ IN CAPITULL LETTRS
   LIKE THIS!!!), use (and often misuse) of fragments of {talk mode}
   abbreviations, a long {sig block} (sometimes even a {doubled
   sig}), and unbounded naivete.  B1FF posts articles using his
   elder brother's VIC-20.  B1FF's location is a mystery, as his
   articles appear to come from a variety of sites.  However,
   {BITNET} seems to be the most frequent origin.  The theory that
   B1FF is a denizen of BITNET is supported by B1FF's (unfortunately
   invalid) electronic mail address: B1FF@BIT.NET.

   [1993: Now It Can Be Told!  My spies inform me that B1FF was
   originally created by Joe Talmadge <jat@cup.hp.com>, also the
   author of the infamous and much-plagiarized "Flamer's Bible".
   The BIFF filter he wrote was later passed to Richard Sexton, who
   posted BIFFisms much more widely.  Versions have since been posted
   for the amusement of the net at large. --ESR]

:biff: /bif/ /vt./  To notify someone of incoming mail.  From
   the BSD utility `biff(1)', which was in turn named after a
   friendly golden Labrador who used to chase frisbees in the halls at
   UCB while 4.2BSD was in development.  There was a legend that it
   had a habit of barking whenever the mailman came, but the author of
   `biff' says this is not true.  No relation to {B1FF}.

:Big Gray Wall: /n./  What faces a {VMS} user searching for
   documentation.  A full VMS kit comes on a pallet, the documentation
   taking up around 15 feet of shelf space before the addition of
   layered products such as compilers, databases, multivendor
   networking, and programming tools.  Recent (since VMS version 5)
   DEC documentation comes with gray binders; under VMS version 4 the
   binders were orange (`big orange wall'), and under version 3 they
   were blue.  See {VMS}.  Often contracted to `Gray Wall'.

:big iron: /n./  Large, expensive, ultra-fast computers.  Used
   generally of {number-crunching} supercomputers such as Crays,
   but can include more conventional big commercial IBMish mainframes.
   Term of approval; compare {heavy metal}, oppose {dinosaur}.

:Big Red Switch: /n./  [IBM] The power switch on a computer,
   esp. the `Emergency Pull' switch on an IBM {mainframe} or the
   power switch on an IBM PC where it really is large and red.  "This
   !@%$% {bitty box} is hung again; time to hit the Big Red
   Switch."  Sources at IBM report that, in tune with the company's
   passion for {TLA}s, this is often abbreviated as `BRS' (this
   has also become established on FidoNet and in the PC {clone}
   world).  It is alleged that the emergency pull switch on an IBM
   360/91 actually fired a non-conducting bolt into the main power
   feed; the BRSes on more recent mainframes physically drop a block
   into place so that they can't be pushed back in.  People get fired
   for pulling them, especially inappropriately (see also
   {molly-guard}).  Compare {power cycle}, {three-finger
   salute}, {120 reset}; see also {scram switch}.

:Big Room, the: /n./  The extremely large room with the blue
   ceiling and intensely bright light (during the day) or black
   ceiling with lots of tiny night-lights (during the night) found
   outside all computer installations.  "He can't come to the phone
   right now, he's somewhere out in the Big Room."

:big win: /n./  Serendipity.  "Yes, those two physicists
   discovered high-temperature superconductivity in a batch of ceramic
   that had been prepared incorrectly according to their experimental
   schedule.  Small mistake; big win!" See {win big}.

:big-endian: /adj./  [From Swift's "Gulliver's Travels" via
   the famous paper "On Holy Wars and a Plea for Peace" by Danny
   Cohen, USC/ISI IEN 137, dated April 1, 1980] 1. Describes a
   computer architecture in which, within a given multi-byte numeric
   representation, the most significant byte has the lowest address
   (the word is stored `big-end-first').  Most processors,
   including the IBM 370 family, the {PDP-10}, the Motorola
   microprocessor families, and most of the various RISC designs
   current in late 1995, are big-endian.  Big-endian byte order is
   also sometimes called `network order'. See {little-endian},
   {middle-endian}, {NUXI problem}, {swab}.  2. An
   {{Internet address}} the wrong way round.  Most of the world
   follows the Internet standard and writes email addresses starting
   with the name of the computer and ending up with the name of the
   country.  In the U.K. the Joint Networking Team had decided to do
   it the other way round before the Internet domain standard was
   established.  Most gateway sites have {ad-hockery} in their
   mailers to handle this, but can still be confused.  In particular,
   the address me@uk.ac.bris.pys.as could be interpreted in
   JANET's big-endian way as one in the U.K. (domain uk) or in the
   standard little-endian way as one in the domain as (American
   Samoa) on the opposite side of the world.

:bignum: /big'nuhm/ /n./  [orig. from MIT MacLISP]
   1. [techspeak] A multiple-precision computer representation for
   very large integers.  2. More generally, any very large number.
   "Have you ever looked at the United States Budget?  There's
   bignums for you!"  3. [Stanford] In backgammon, large numbers on
   the dice especially a roll of double fives or double sixes (compare
   {moby}, sense 4).  See also {El Camino Bignum}.

   Sense 1 may require some explanation.  Most computer languages
   provide a kind of data called `integer', but such computer
   integers are usually very limited in size; usually they must be
   smaller than than 2^(31) (2,147,483,648) or (on a
   {bitty box}) 2^(15) (32,768).  If you want to work
   with numbers larger than that, you have to use floating-point
   numbers, which are usually accurate to only six or seven decimal
   places.  Computer languages that provide bignums can perform exact
   calculations on very large numbers, such as 1000! (the factorial
   of 1000, which is 1000 times 999 times 998 times ... times 2
   times 1).  For example, this value for 1000!  was computed by the
   MacLISP system using bignums:

     40238726007709377354370243392300398571937486421071
     46325437999104299385123986290205920442084869694048
     00479988610197196058631666872994808558901323829669
     94459099742450408707375991882362772718873251977950
     59509952761208749754624970436014182780946464962910
     56393887437886487337119181045825783647849977012476
     63288983595573543251318532395846307555740911426241
     74743493475534286465766116677973966688202912073791
     43853719588249808126867838374559731746136085379534
     52422158659320192809087829730843139284440328123155
     86110369768013573042161687476096758713483120254785
     89320767169132448426236131412508780208000261683151
     02734182797770478463586817016436502415369139828126
     48102130927612448963599287051149649754199093422215
     66832572080821333186116811553615836546984046708975
     60290095053761647584772842188967964624494516076535
     34081989013854424879849599533191017233555566021394
     50399736280750137837615307127761926849034352625200
     01588853514733161170210396817592151090778801939317
     81141945452572238655414610628921879602238389714760
     88506276862967146674697562911234082439208160153780
     88989396451826324367161676217916890977991190375403
     12746222899880051954444142820121873617459926429565
     81746628302955570299024324153181617210465832036786
     90611726015878352075151628422554026517048330422614
     39742869330616908979684825901254583271682264580665
     26769958652682272807075781391858178889652208164348
     34482599326604336766017699961283186078838615027946
     59551311565520360939881806121385586003014356945272
     24206344631797460594682573103790084024432438465657
     24501440282188525247093519062092902313649327349756
     55139587205596542287497740114133469627154228458623
     77387538230483865688976461927383814900140767310446
     64025989949022222176590433990188601856652648506179
     97023561938970178600408118897299183110211712298459
     01641921068884387121855646124960798722908519296819
     37238864261483965738229112312502418664935314397013
     74285319266498753372189406942814341185201580141233
     44828015051399694290153483077644569099073152433278
     28826986460278986432113908350621709500259738986355
     42771967428222487575867657523442202075736305694988
     25087968928162753848863396909959826280956121450994
     87170124451646126037902930912088908694202851064018
     21543994571568059418727489980942547421735824010636
     77404595741785160829230135358081840096996372524230
     56085590370062427124341690900415369010593398383577
     79394109700277534720000000000000000000000000000000
     00000000000000000000000000000000000000000000000000
     00000000000000000000000000000000000000000000000000
     00000000000000000000000000000000000000000000000000
     00000000000000000000000000000000000000000000000000
     000000000000000000.

:bigot: /n./  A person who is religiously attached to a
   particular computer, language, operating system, editor, or other
   tool (see {religious issues}).  Usually found with a specifier;
   thus, `cray bigot', `ITS bigot', `APL bigot', `VMS bigot',
   `Berkeley bigot'.  Real bigots can be distinguished from mere
   partisans or zealots by the fact that they refuse to learn
   alternatives even when the march of time and/or technology is
   threatening to obsolete the favored tool.  It is truly said "You
   can tell a bigot, but you can't tell him much."  Compare
   {weenie}.

:bit: /n./  [from the mainstream meaning and `Binary digIT']
   1. [techspeak] The unit of information; the amount of information
   obtained by asking a yes-or-no question for which the two outcomes
   are equally probable.  2. [techspeak] A computational quantity that
   can take on one of two values, such as true and false or 0 and 1.
   3. A mental flag: a reminder that something should be done
   eventually.  "I have a bit set for you."  (I haven't seen you for
   a while, and I'm supposed to tell or ask you something.)  4. More
   generally, a (possibly incorrect) mental state of belief.  "I have
   a bit set that says that you were the last guy to hack on EMACS."
   (Meaning "I think you were the last guy to hack on EMACS, and what
   I am about to say is predicated on this, so please stop me if this
   isn't true.")

   "I just need one bit from you" is a polite way of indicating that
   you intend only a short interruption for a question that can
   presumably be answered yes or no.

   A bit is said to be `set' if its value is true or 1, and
   `reset' or `clear' if its value is false or 0.  One speaks of
   setting and clearing bits.  To {toggle} or `invert' a bit is
   to change it, either from 0 to 1 or from 1 to 0.  See also
   {flag}, {trit}, {mode bit}.

   The term `bit' first appeared in print in the computer-science
   sense in 1949, and seems to have been coined by early computer
   scientist John Tukey.  Tukey records that it evolved over a lunch
   table as a handier alternative to `bigit' or `binit'.

:bit bang: /n./  Transmission of data on a serial line, when
   accomplished by rapidly tweaking a single output bit, in software,
   at the appropriate times.  The technique is a simple loop with
   eight OUT and SHIFT instruction pairs for each byte.  Input is more
   interesting.  And full duplex (doing input and output at the same
   time) is one way to separate the real hackers from the
   {wannabee}s.

   Bit bang was used on certain early models of Prime computers,
   presumably when UARTs were too expensive, and on archaic Z80 micros
   with a Zilog PIO but no SIO.  In an interesting instance of the
   {cycle of reincarnation}, this technique returned to use in the
   early 1990s on some RISC architectures because it consumes such
   an infinitesimal part of the processor that it actually makes sense
   not to have a UART.  Compare {cycle of reincarnation}.

:bit bashing: /n./  (alt. `bit diddling' or {bit
   twiddling}) Term used to describe any of several kinds of low-level
   programming characterized by manipulation of {bit}, {flag},
   {nybble}, and other smaller-than-character-sized pieces of data;
   these include low-level device control, encryption algorithms,
   checksum and error-correcting codes, hash functions, some flavors
   of graphics programming (see {bitblt}), and assembler/compiler
   code generation.  May connote either tedium or a real technical
   challenge (more usually the former).  "The command decoding for
   the new tape driver looks pretty solid but the bit-bashing for the
   control registers still has bugs."  See also {bit bang},
   {mode bit}.

:bit bucket: /n./  1. The universal data sink (originally, the
   mythical receptacle used to catch bits when they fall off the end
   of a register during a shift instruction).  Discarded, lost, or
   destroyed data is said to have `gone to the bit bucket'.  On
   {{Unix}}, often used for {/dev/null}.  Sometimes amplified as
   `the Great Bit Bucket in the Sky'.  2. The place where all lost
   mail and news messages eventually go.  The selection is performed
   according to {Finagle's Law}; important mail is much more likely
   to end up in the bit bucket than junk mail, which has an almost
   100% probability of getting delivered.  Routing to the bit bucket
   is automatically performed by mail-transfer agents, news systems,
   and the lower layers of the network.  3. The ideal location for all
   unwanted mail responses: "Flames about this article to the bit
   bucket."  Such a request is guaranteed to overflow one's mailbox
   with flames.  4. Excuse for all mail that has not been sent.  "I
   mailed you those figures last week; they must have landed in the
   bit bucket."  Compare {black hole}.

   This term is used purely in jest.  It is based on the fanciful
   notion that bits are objects that are not destroyed but only
   misplaced.  This appears to have been a mutation of an earlier term
   `bit box', about which the same legend was current; old-time
   hackers also report that trainees used to be told that when the CPU
   stored bits into memory it was actually pulling them `out of the
   bit box'.  See also {chad box}.

   Another variant of this legend has it that, as a consequence of the
   `parity preservation law', the number of 1 bits that go to the bit
   bucket must equal the number of 0 bits.  Any imbalance results in
   bits filling up the bit bucket.  A qualified computer technician
   can empty a full bit bucket as part of scheduled maintenance.

:bit decay: /n./  See {bit rot}.  People with a physics
   background tend to prefer this variant for the analogy with
   particle decay.  See also {computron}, {quantum
   bogodynamics}.

:bit rot: /n./  Also {bit decay}.  Hypothetical disease the
   existence of which has been deduced from the observation that
   unused programs or features will often stop working after
   sufficient time has passed, even if `nothing has changed'.  The
   theory explains that bits decay as if they were radioactive.  As
   time passes, the contents of a file or the code in a program will
   become increasingly garbled.

   There actually are physical processes that produce such effects
   (alpha particles generated by trace radionuclides in ceramic chip
   packages, for example, can change the contents of a computer memory
   unpredictably, and various kinds of subtle media failures can
   corrupt files in mass storage), but they are quite rare (and
   computers are built with error-detecting circuitry to compensate
   for them).  The notion long favored among hackers that cosmic
   rays are among the causes of such events turns out to be a myth;
   see the {cosmic rays} entry for details.

   The term {software rot} is almost synonymous.  Software rot is
   the effect, bit rot the notional cause.

:bit twiddling: /n./  1. (pejorative) An exercise in tuning (see
   {tune}) in which incredible amounts of time and effort go to
   produce little noticeable improvement, often with the result that
   the code becomes incomprehensible.  2. Aimless small modification
   to a program, esp. for some pointless goal.  3. Approx. syn. for
   {bit bashing}; esp. used for the act of frobbing the device
   control register of a peripheral in an attempt to get it back to a
   known state.

:bit-paired keyboard: /n./ obs.  (alt. `bit-shift keyboard')
   A non-standard keyboard layout that seems to have originated with
   the Teletype ASR-33 and remained common for several years on early
   computer equipment.  The ASR-33 was a mechanical device (see
   {EOU}), so the only way to generate the character codes from
   keystrokes was by some physical linkage.  The design of the ASR-33
   assigned each character key a basic pattern that could be modified
   by flipping bits if the SHIFT or the CTRL key was pressed.  In
   order to avoid making the thing more of a Rube Goldberg kluge than
   it already was, the design had to group characters that shared the
   same basic bit pattern on one key.

   Looking at the ASCII chart, we find:

     high  low bits
     bits  0000 0001 0010 0011 0100 0101 0110 0111 1000 1001
      010        !    "    #    $    %    &    '    (    )
      011   0    1    2    3    4    5    6    7    8    9

   This is why the characters !"#$%&'() appear where they do on a
   Teletype (thankfully, they didn't use shift-0 for space).  This was
   *not* the weirdest variant of the {QWERTY} layout widely
   seen, by the way; that prize should probably go to one of several
   (differing) arrangements on IBM's even clunkier 026 and 029 card
   punches.

   When electronic terminals became popular, in the early 1970s, there
   was no agreement in the industry over how the keyboards should be
   laid out.  Some vendors opted to emulate the Teletype keyboard,
   while others used the flexibility of electronic circuitry to make
   their product look like an office typewriter.  These alternatives
   became known as `bit-paired' and `typewriter-paired' keyboards.  To
   a hacker, the bit-paired keyboard seemed far more logical -- and
   because most hackers in those days had never learned to touch-type,
   there was little pressure from the pioneering users to adapt
   keyboards to the typewriter standard.

   The doom of the bit-paired keyboard was the large-scale
   introduction of the computer terminal into the normal office
   environment, where out-and-out technophobes were expected to use
   the equipment.  The `typewriter-paired' standard became universal,
   `bit-paired' hardware was quickly junked or relegated to dusty
   corners, and both terms passed into disuse.

:bitblt: /bit'blit/ /n./  [from {BLT}, q.v.] 1. Any of a
   family of closely related algorithms for moving and copying
   rectangles of bits between main and display memory on a bit-mapped
   device, or between two areas of either main or display memory (the
   requirement to do the {Right Thing} in the case of overlapping
   source and destination rectangles is what makes BitBlt tricky).
   2. Synonym for {blit} or {BLT}.  Both uses are borderline
   techspeak.

:BITNET: /bit'net/ /n./  [acronym: Because It's Time NETwork]
   Everybody's least favorite piece of the network (see {network,
   the}).  The BITNET hosts are a collection of IBM dinosaurs and
   VAXen (the latter with lobotomized comm hardware) that communicate
   using 80-character {{EBCDIC}} card images (see {eighty-column
   mind}); thus, they tend to mangle the headers and text of
   third-party traffic from the rest of the ASCII/{RFC}-822 world
   with annoying regularity.  BITNET was also notorious as the
   apparent home of {B1FF}.

:bits: /pl.n./  1. Information.  Examples: "I need some bits
   about file formats."  ("I need to know about file formats.")
   Compare {core dump}, sense 4.  2. Machine-readable
   representation of a document, specifically as contrasted with
   paper: "I have only a photocopy of the Jargon File; does anyone
   know where I can get the bits?".  See {softcopy}, {source of
   all good bits} See also {bit}.

:bitty box: /bit'ee boks/ /n./  1. A computer sufficiently
   small, primitive, or incapable as to cause a hacker acute
   claustrophobia at the thought of developing software on or for it.
   Especially used of small, obsolescent, single-tasking-only personal
   machines such as the Atari 800, Osborne, Sinclair, VIC-20, TRS-80,
   or IBM PC.  2. [Pejorative] More generally, the opposite of
   `real computer' (see {Get a real computer!}).  See also
   {mess-dos}, {toaster}, and {toy}.

:bixie: /bik'see/ /n./  Variant {emoticon}s used on BIX
   (the Byte Information eXchange).  The {smiley} bixie is <@_@>,
   apparently intending to represent two cartoon eyes and a mouth.  A
   few others have been reported.

:black art: /n./  A collection of arcane, unpublished, and (by
   implication) mostly ad-hoc techniques developed for a particular
   application or systems area (compare {black magic}).  VLSI
   design and compiler code optimization were (in their beginnings)
   considered classic examples of black art; as theory developed they
   became {deep magic}, and once standard textbooks had been
   written, became merely {heavy wizardry}.  The huge proliferation
   of formal and informal channels for spreading around new
   computer-related technologies during the last twenty years has made
   both the term `black art' and what it describes less common than
   formerly.  See also {voodoo programming}.

:black hole: /n./  What a piece of email or netnews has fallen
   into if it disappears mysteriously between its origin and
   destination sites (that is, without returning a {bounce
   message}).  "I think there's a black hole at foovax!" conveys
   suspicion that site foovax has been dropping a lot of stuff on
   the floor lately (see {drop on the floor}).  The implied
   metaphor of email as interstellar travel is interesting in itself.
   Compare {bit bucket}.

:black magic: /n./  A technique that works, though nobody really
   understands why.  More obscure than {voodoo programming}, which
   may be done by cookbook.  Compare also {black art}, {deep
   magic}, and {magic number} (sense 2).

:Black Screen of Death: n.  [prob. related to the
   Floating Head of Death in a famous "Far Side" cartoon.] A
   failure mode of {Microsloth Windows}.  On an attempt to launch a
   DOS box, a networked Windows system not uncommonly blanks the
   screen and locks up the PC so hard that it requires a cold
   {boot} to recover. This unhappy phenomenon is known as The Black
   Screen of Death.

:Black Thursday: n.  February 8th, 1996 -- the day of the
   signing into law of the {CDA}, so called by analogy with the
   catastrophic "Black Friday" in 1929 that began the Great
   Depression.

:blammo: /v./  [Oxford Brookes University and alumni, UK] To
   forcibly remove someone from any interactive system, especially
   talker systems. The operators, who may remain hidden, may `blammo'
   a user who is misbehaving.  Very similar to MIT {gun}; in fact,
   the `blammo-gun' is a notional device used to `blammo' someone.
   While in actual fact the only incarnation of the blammo-gun is the
   command used to forcibly eject a user, operators speak of different
   levels of blammo-gun fire; e.g., a blammo-gun to `stun' will
   temporarily remove someone, but a blammo-gun set to `maim' will
   stop someone coming back on for a while.

:blargh: /blarg/ /n./  [MIT] The opposite of {ping}, sense
   5; an exclamation indicating that one has absorbed or is emitting a
   quantum of unhappiness.  Less common than {ping}.

:blast: 1. /v.,n./  Synonym for {BLT}, used esp. for large
   data sends over a network or comm line.  Opposite of {snarf}.
   Usage: uncommon.  The variant `blat' has been reported.  2. vt.
   [HP/Apollo] Synonymous with {nuke} (sense 3).  Sometimes the
   message `Unable to kill all processes.  Blast them (y/n)?'
   would appear in the command window upon logout.

:blat: /n./ 1. Syn. {blast}, sense 1.  2. See {thud}.

:bletch: /blech/ /interj./  [from Yiddish/German `brechen', to
   vomit, poss.  via comic-strip exclamation `blech'] Term
   of disgust.  Often used in "Ugh, bletch".  Compare {barf}.

:bletcherous: /blech'*-r*s/ /adj./  Disgusting in design or
   function; esthetically unappealing.  This word is seldom used of
   people.  "This keyboard is bletcherous!" (Perhaps the keys don't
   work very well, or are misplaced.)  See {losing},
   {cretinous}, {bagbiting}, {bogus}, and {random}.  The
   term {bletcherous} applies to the esthetics of the thing so
   described; similarly for {cretinous}.  By contrast, something
   that is `losing' or `bagbiting' may be failing to meet
   objective criteria.  See also {bogus} and {random}, which
   have richer and wider shades of meaning than any of the above.

:blink: /vi.,n./  To use a navigator or off-line message reader
   to minimize time spent on-line to a commercial network service.
   As of late 1994, this term was said to be in wide use in the UK,
   but is rare or unknown in the US.

:blinkenlights: /blink'*n-li:tz/ /n./  Front-panel diagnostic
   lights on a computer, esp. a {dinosaur}.  Derives from the
   last word of the famous blackletter-Gothic sign in mangled
   pseudo-German that once graced about half the computer rooms in the
   English-speaking world.  One version ran in its entirety as
   follows:

                   ACHTUNG!  ALLES LOOKENSPEEPERS!  Das
     computermachine ist nicht fuer gefingerpoken und mittengrabben.
     Ist easy schnappen der springenwerk, blowenfusen und poppencorken
     mit spitzensparken.  Ist nicht fuer gewerken bei das dumpkopfen.
     Das rubbernecken sichtseeren keepen das cotten-pickenen hans in
     das pockets muss; relaxen und watchen das blinkenlichten.

   This silliness dates back at least as far as 1959 at Stanford
   University and had already gone international by the early 1960s,
   when it was reported at London University's ATLAS computing site.
   There are several variants of it in circulation, some of which
   actually do end with the word `blinkenlights'.

   In an amusing example of turnabout-is-fair-play, German hackers
   have developed their own versions of the blinkenlights poster in
   fractured English, one of which is reproduced here:

                              ATTENTION

     This room is fullfilled mit special electronische equippment.
     Fingergrabbing and pressing the cnoeppkes from the computers is
     allowed for die experts only!  So all the "lefthanders" stay away
     and do not disturben the brainstorming von here working
     intelligencies.  Otherwise you will be out thrown and kicked
     anderswhere!  Also: please keep still and only watchen
     astaunished the blinkenlights.

   See also {geef}.

   Old-time hackers sometimes get nostalgic for blinkenlights because
   they were so much more fun to look at than a blank panel.  Sadly,
   very few computers still have them (the three LEDs on a PC keyboard
   certainly don't count). The obvious reasons (cost of wiring, cost
   of front-panel cutouts, almost nobody needs or wants to interpret
   machine-register states on the fly anymore) are only part of the
   story.  Another part of it is that radio-frequency leakage from the
   lamp wiring was beginning to be a problem as far back as transistor
   machines.  But the most fundamental fact is that there are very few
   signals slow enough to blink an LED these days!  With slow CPUs,
   you could watch the bus register or instruction counter tick, but
   at 33/66/150MHz it's all a blur.

:blit: /blit/ /vt./  1. To copy a large array of bits from one
   part of a computer's memory to another part, particularly when the
   memory is being used to determine what is shown on a display
   screen.  "The storage allocator picks through the table and copies
   the good parts up into high memory, and then blits it all back down
   again."  See {bitblt}, {BLT}, {dd}, {cat}, {blast},
   {snarf}.  More generally, to perform some operation (such as
   toggling) on a large array of bits while moving them.  2. Sometimes
   all-capitalized as `BLIT': an early experimental bit-mapped
   terminal designed by Rob Pike at Bell Labs, later commercialized as
   the AT&T 5620.  (The folk etymology from `Bell Labs Intelligent
   Terminal' is incorrect.  Its creators liked to claim that "Blit"
   stood for the Bacon, Lettuce, and Interactive Tomato.)

:blitter: /blit'r/ /n./  A special-purpose chip or hardware
   system built to perform {blit} operations, esp. used for fast
   implementation of bit-mapped graphics.  The Commodore Amiga and a
   few other micros have these, but sine 1990 the trend is away from
   them (however, see {cycle of reincarnation}).  Syn. {raster
   blaster}.

:blivet: /bliv'*t/ /n./  [allegedly from a World War II
   military term meaning "ten pounds of manure in a five-pound bag"]
   1. An intractable problem.  2. A crucial piece of hardware that
   can't be fixed or replaced if it breaks.  3. A tool that has been
   hacked over by so many incompetent programmers that it has become
   an unmaintainable tissue of hacks.  4. An out-of-control but
   unkillable development effort.  5. An embarrassing bug that pops up
   during a customer demo.  6. In the subjargon of computer security
   specialists, a denial-of-service attack performed by hogging
   limited resources that have no access controls (for example, shared
   spool space on a multi-user system).

   This term has other meanings in other technical cultures; among
   experimental physicists and hardware engineers of various kinds it
   seems to mean any random object of unknown purpose (similar to
   hackish use of {frob}).  It has also been used to describe an
   amusing trick-the-eye drawing resembling a three-pronged fork that
   appears to depict a three-dimensional object until one realizes
   that the parts fit together in an impossible way.

:BLOB:  1. /n./ [acronym: Binary Large OBject] Used by database
   people to refer to any random large block of bits that needs to be
   stored in a database, such as a picture or sound file.  The
   essential point about a BLOB is that it's an object that cannot be
   interpreted within the database itself.  2. /v./ To {mailbomb}
   someone by sending a BLOB to him/her; esp. used as a mild threat.
   "If that program crashes again, I'm going to BLOB the core dump to
   you."

:block: /v./  [from process scheduling terminology in OS theory]
   1. /vi./ To delay or sit idle while waiting for something.  "We're
   blocking until everyone gets here."  Compare {busy-wait}.
   2. `block on' /vt./ To block, waiting for (something).  "Lunch is
   blocked on Phil's arrival."

:block transfer computations: /n./  [from the television series
   "Dr. Who"] Computations so fiendishly subtle and complex that
   they could not be performed by machines.  Used to refer to any task
   that should be expressible as an algorithm in theory, but isn't.
   (The Z80's LDIR instruction, "Computed Block Transfer with
   increment", may also be relevant)

:Bloggs Family, the: /n./  An imaginary family consisting of
   Fred and Mary Bloggs and their children.  Used as a standard
   example in knowledge representation to show the difference between
   extensional and intensional objects.  For example, every occurrence
   of "Fred Bloggs" is the same unique person, whereas occurrences
   of "person" may refer to different people.  Members of the Bloggs
   family have been known to pop up in bizarre places such as the DEC
   Telephone Directory.  Compare {Mbogo, Dr. Fred}.

:blow an EPROM: /bloh *n ee'prom/ /v./  (alt. `blast an
   EPROM', `burn an EPROM') To program a read-only memory, e.g.
   for use with an embedded system.  This term arose because the
   programming process for the Programmable Read-Only Memories (PROMs)
   that preceded present-day Erasable Programmable Read-Only Memories
   (EPROMs) involved intentionally blowing tiny electrical fuses on
   the chip.  The usage lives on (it's too vivid and expressive to
   discard) even though the write process on EPROMs is nondestructive.

:blow away: /vt./  To remove (files and directories) from
   permanent storage, generally by accident.  "He reformatted the
   wrong partition and blew away last night's netnews."  Oppose
   {nuke}.

:blow out: /vi./  [prob. from mining and tunneling jargon] Of
   software, to fail spectacularly; almost as serious as {crash and
   burn}.  See {blow past}, {blow up}, {die horribly}.

:blow past: /vt./  To {blow out} despite a safeguard.  "The
   server blew past the 5K reserve buffer."

:blow up: /vi./  1. [scientific computation] To become unstable.
   Suggests that the computation is diverging so rapidly that it will
   soon overflow or at least go {nonlinear}.  2.  Syn. {blow
   out}.

:BLT: /B-L-T/, /bl*t/ or (rarely) /belt/ /n.,vt./  Synonym
   for {blit}.  This is the original form of {blit} and the
   ancestor of {bitblt}.  It referred to any large bit-field copy
   or move operation (one resource-intensive memory-shuffling
   operation done on pre-paged versions of ITS, WAITS, and TOPS-10 was
   sardonically referred to as `The Big BLT').  The jargon usage has
   outlasted the {PDP-10} BLock Transfer instruction from which
   {BLT} derives; nowadays, the assembler mnemonic {BLT} almost
   always means `Branch if Less Than zero'.

:Blue Book: /n./  1. Informal name for one of the three standard
   references on the page-layout and graphics-control language
   {{PostScript}} ("PostScript Language Tutorial and Cookbook",
   Adobe Systems, Addison-Wesley 1985, QA76.73.P67P68, ISBN
   0-201-10179-3); the other three official guides are known as the
   {Green Book}, the {Red Book}, and the {White Book} (sense
   2).  2. Informal name for one of the three standard references on
   Smalltalk: "Smalltalk-80: The Language and its
   Implementation", David Robson, Addison-Wesley 1983, QA76.8.S635G64,
   ISBN 0-201-11371-63 (this book also has green and red siblings).
   3. Any of the 1988 standards issued by the CCITT's ninth plenary
   assembly.  These include, among other things, the X.400 email spec
   and the Group 1 through 4 fax standards.  See also {{book
   titles}}.

:blue box:  /n./ 1. obs. Once upon a time, before
   all-digital switches made it possible for the phone companies to
   move them out of band, one could actually hear the switching tones
   used to route long-distance calls.  Early {phreaker}s built
   devices called `blue boxes' that could reproduce these tones,
   which could be used to commandeer portions of the phone network.
   (This was not as hard as it may sound; one early phreak acquired
   the sobriquet `Captain Crunch' after he proved that he could
   generate switching tones with a plastic whistle pulled out of a box
   of Captain Crunch cereal!) There were other colors of box with more
   specialized phreaking uses; red boxes, black boxes, silver boxes,
   etc.  2. /n./ An {IBM} machine, especially a large (non-PC)
   one.

:Blue Glue: /n./  [IBM] IBM's SNA (Systems Network
   Architecture), an incredibly {losing} and {bletcherous}
   communications protocol widely favored at commercial shops that
   don't know any better.  The official IBM definition is "that which
   binds blue boxes together."  See {fear and loathing}.  It may
   not be irrelevant that {Blue Glue} is the trade name of a 3M
   product that is commonly used to hold down the carpet squares to
   the removable panel floors common in {dinosaur pen}s.  A
   correspondent at U. Minn. reports that the CS department there has
   about 80 bottles of the stuff hanging about, so they often refer to
   any messy work to be done as `using the blue glue'.

:blue goo: /n./  Term for `police' {nanobot}s intended to
   prevent {gray goo}, denature hazardous waste, destroy pollution,
   put ozone back into the stratosphere, prevent halitosis, and
   promote truth, justice, and the American way, etc.  The term
   `Blue Goo' can be found in Dr. Seuss's "Fox In Socks" to
   refer to a substance much like bubblegum.  `Would you like to
   chew blue goo, sir?'.  See {{nanotechnology}}.

:blue wire: /n./  [IBM] Patch wires added to circuit boards at
   the factory to correct design or fabrication problems.  These may
   be necessary if there hasn't been time to design and qualify
   another board version.  Compare {purple wire}, {red wire},
   {yellow wire}.

:blurgle: /bler'gl/ /n./  [UK] Spoken {metasyntactic
   variable}, to indicate some text that is obvious from context, or
   which is already known. If several words are to be replaced,
   blurgle may well be doubled or tripled. "To look for something in
   several files use `grep string blurgle blurgle'."  In each case,
   "blurgle blurgle" would be understood to be replaced by the file
   you wished to search.  Compare {mumble}, sense 7.

:BNF: /B-N-F/ /n./  1. [techspeak] Acronym for `Backus-Naur
   Form', a metasyntactic notation used to specify the syntax of
   programming languages, command sets, and the like.  Widely used for
   language descriptions but seldom documented anywhere, so that it
   must usually be learned by osmosis from other hackers.  Consider
   this BNF for a U.S. postal address:

      <postal-address> ::= <name-part> <street-address> <zip-part>

      <personal-part> ::= <name> | <initial> "."

      <name-part> ::= <personal-part> <last-name> [<jr-part>] <EOL>
                    | <personal-part> <name-part>

      <street-address> ::= [<apt>] <house-num> <street-name> <EOL>

      <zip-part> ::= <town-name> "," <state-code> <ZIP-code> <EOL>

   This translates into English as: "A postal-address consists of a
   name-part, followed by a street-address part, followed by a
   zip-code part.  A personal-part consists of either a first name or
   an initial followed by a dot.  A name-part consists of either: a
   personal-part followed by a last name followed by an optional
   `jr-part' (Jr., Sr., or dynastic number) and end-of-line, or a
   personal part followed by a name part (this rule illustrates the
   use of recursion in BNFs, covering the case of people who use
   multiple first and middle names and/or initials).  A street address
   consists of an optional apartment specifier, followed by a street
   number, followed by a street name.  A zip-part consists of a
   town-name, followed by a comma, followed by a state code, followed
   by a ZIP-code followed by an end-of-line."  Note that many things
   (such as the format of a personal-part, apartment specifier, or
   ZIP-code) are left unspecified.  These are presumed to be obvious
   from context or detailed somewhere nearby.  See also {parse}.
   2. Any of a number number of variants and extensions of BNF proper,
   possibly containing some or all of the {regexp} wildcards such
   as `*' or `+'.  In fact the example above isn't the pure
   form invented for the Algol-60 report; it uses `[]', which was
   introduced a few years later in IBM's PL/I definition but is now
   universally recognized.  3. In {{science-fiction fandom}}, a
   `Big-Name Fan' (someone famous or notorious).  Years ago a fan
   started handing out black-on-green BNF buttons at SF conventions;
   this confused the hacker contingent terribly.

:boa: [IBM] /n./  Any one of the fat cables that lurk under the
   floor in a {dinosaur pen}.  Possibly so called because they
   display a ferocious life of their own when you try to lay them
   straight and flat after they have been coiled for some time.  It is
   rumored within IBM that channel cables for the 370 are limited to
   200 feet because beyond that length the boas get dangerous -- and
   it is worth noting that one of the major cable makers uses the
   trademark `Anaconda'.

:board: /n./  1. In-context synonym for {bboard}; sometimes
   used even for Usenet newsgroups (but see usage note under
   {bboard}, sense 1).  2. An electronic circuit board.

:boat anchor: /n./  1. Like {doorstop} but more severe;
   implies that the offending hardware is irreversibly dead or
   useless.  "That was a working motherboard once.  One lightning
   strike later, instant boat anchor!"  2. A person who just takes up
   space.  3. Obsolete but still working hardware, especially
   when used of an old S100-bus hobbyist system; originally a term of
   annoyance, but became more and more affectionate as the hardware
   became more and more obsolete.

:bodysurf code: /n./  A program or segment of code written
   quickly in the heat of inspiration without the benefit of formal
   design or deep thought.  Like its namesake sport, the result is
   too often a wipeout that leaves the programmer eating sand.

:BOF: /B-O-F/ or /bof/ /n./  Abbreviation for the phrase
   "Birds Of a Feather" (flocking together), an informal discussion
   group and/or bull session scheduled on a conference program.  It is
   not clear where or when this term originated, but it is now
   associated with the USENIX conferences for Unix techies and was
   already established there by 1984.  It was used earlier than that
   at DECUS conferences and is reported to have been common at SHARE
   meetings as far back as the early 1960s.

:BOFH: // /n./  Acronym, Bastard Operator From Hell.  A system
   administrator with absolutely no tolerance for {luser}s.  "You
   say you need more filespace?  <massive-global-delete> Seems to me
   you have plenty left..."  Many BOFHs (and others who would be
   BOFHs if they could get away with it) hang out in the newsgroup
   alt.sysadmin.recovery, although there has also been created a
   top-level newsgroup hierarchy (bofh.*) of their own.

   Several people have written stories about BOFHs. The set usually
   considered canonical is by Simon Travaglia and may be found at the
   Bastard Home Page,
   http://prime-mover.cc.waikato.ac.nz/Bastard.html.

:bogo-sort: /boh`goh-sort'/ /n./  (var. `stupid-sort') The
   archetypical perversely awful algorithm (as opposed to {bubble
   sort}, which is merely the generic *bad* algorithm).
   Bogo-sort is equivalent to repeatedly throwing a deck of cards in
   the air, picking them up at random, and then testing whether they
   are in order.  It serves as a sort of canonical example of
   awfulness.  Looking at a program and seeing a dumb algorithm, one
   might say "Oh, I see, this program uses bogo-sort."  Compare
   {bogus}, {brute force}, {Lasherism}.

:bogometer: /boh-gom'-*t-er/ /n./  A notional instrument for
   measuring {bogosity}.  Compare the `wankometer' described in
   the {wank} entry; see also {bogus}.

:bogon: /boh'gon/ /n./  [by analogy with
   proton/electron/neutron, but doubtless reinforced after 1980 by the
   similarity to Douglas Adams's `Vogons'; see the {Bibliography}
   in Appendix C and note that Arthur Dent actually mispronounces
   `Vogons' as `Bogons' at one point] 1. The elementary particle of
   bogosity (see {quantum bogodynamics}).  For instance, "the
   Ethernet is emitting bogons again" means that it is broken or
   acting in an erratic or bogus fashion.  2. A query packet sent from
   a TCP/IP domain resolver to a root server, having the reply bit set
   instead of the query bit.  3. Any bogus or incorrectly formed
   packet sent on a network.  4. By synecdoche, used to refer to any
   bogus thing, as in "I'd like to go to lunch with you but I've got
   to go to the weekly staff bogon".  5. A person who is bogus or
   who says bogus things.  This was historically the original usage,
   but has been overtaken by its derivative senses 1--4.  See also
   {bogosity}, {bogus}; compare {psyton}, {fat electrons},
   {magic smoke}.

   The bogon has become the type case for a whole bestiary of nonce
   particle names, including the `clutron' or `cluon' (indivisible
   particle of cluefulness, obviously the antiparticle of the bogon)
   and the futon (elementary particle of {randomness}, or sometimes
   of lameness).  These are not so much live usages in themselves as
   examples of a live meta-usage: that is, it has become a standard
   joke or linguistic maneuver to "explain" otherwise mysterious
   circumstances by inventing nonce particle names.  And these imply
   nonce particle theories, with all their dignity or lack thereof (we
   might note parenthetically that this is a generalization from
   "(bogus particle) theories" to "bogus (particle theories)"!).
   Perhaps such particles are the modern-day equivalents of trolls and
   wood-nymphs as standard starting-points around which to construct
   explanatory myths.  Of course, playing on an existing word (as in
   the `futon') yields additional flavor.  Compare {magic
   smoke}.

:bogon filter: /boh'gon fil'tr/ /n./  Any device, software or
   hardware, that limits or suppresses the flow and/or emission of
   bogons.  "Engineering hacked a bogon filter between the Cray and
   the VAXen, and now we're getting fewer dropped packets."  See also
   {bogosity}, {bogus}.

:bogon flux: /boh'gon fluhks/ /n./  A measure of a supposed
   field of {bogosity} emitted by a speaker, measured by a
   {bogometer}; as a speaker starts to wander into increasing
   bogosity a listener might say "Warning, warning, bogon flux is
   rising".  See {quantum bogodynamics}.

:bogosity: /boh-go's*-tee/ /n./  1. The degree to which
   something is {bogus}.  At CMU, bogosity is measured with a
   {bogometer}; in a seminar, when a speaker says something bogus,
   a listener might raise his hand and say "My bogometer just
   triggered".  More extremely, "You just pinned my bogometer"
   means you just said or did something so outrageously bogus that it
   is off the scale, pinning the bogometer needle at the highest
   possible reading (one might also say "You just redlined my
   bogometer").  The agreed-upon unit of bogosity is the
   {microLenat}.  2. The potential field generated by a {bogon
   flux}; see {quantum bogodynamics}.  See also {bogon flux},
   {bogon filter}, {bogus}.

:bogotify: /boh-go't*-fi:/ /vt./  To make or become bogus.  A
   program that has been changed so many times as to become completely
   disorganized has become bogotified.  If you tighten a nut too hard
   and strip t