The Hacker's Dictionary by - (sneezy the snowman read aloud txt) 📕

words which themselves have entries in the File. This isn't done all the time for every such word, but it is done everywhere that a reminder seems useful that the term has a jargon meaning and one might wish to refer to its entry.

In this all-ASCII version, headwords for topic entries are distinguished from those for ordinary entries by being followed by "::" rather than ":"; similarly, references are surrounded by "{{" and "}}" rather than "{" and "}".

Defining instances of terms and phrases appear in `slanted type'. A defining instance is one which occurs near to or as part of an explanation of it.

Prefix * is used as linguists do; to mark examples of incorrect usage.

We follow the `logical' quoting convention described in the Writing Style section above. In addition, we reserve double quotes for actual excerpts of text or (sometimes invented) speech. Scare quotes (which mark a word being used in a nonstandard way), and philosopher's quotes (which turn an utterance into the string of letters or words that name it) are both rendered with single quotes.

References such as malloc(3)' andpatch(1)' are to UNIX facilities (some of which, such as patch(1)', are actually freeware distributed over USENET). The UNIX manuals usefoo(n)' to refer to item foo in section (n) of the manual, where n=1 is utilities, n=2 is system calls, n=3 is C library routines, n=6 is games, and n=8 (where present) is system administration utilities. Sections 4, 5, and 7 of the manuals have changed roles frequently and in any case are not referred to in any of the entries.

Various abbreviations used frequently in the lexicon are summarized here: abbrev.

abbreviation

adj.

adjective

adv.

adverb

alt.

alternate

cav.

caveat

esp.

especially

excl.

exclamation

imp.

imperative

interj.

interjection

n.

noun

obs.

obsolete

pl.

plural

poss.

possibly

pref.

prefix

prob.

probably

prov.

proverbial

quant.

quantifier

suff.

suffix

syn.

synonym (or synonymous with)

v.

verb (may be transitive or intransitive) var. variant

vi.

intransitive verb

vt.

transitive verb

Where alternate spellings or pronunciations are given, alt.

separates two possibilities with nearly equal distribution, while var. prefixes one that is markedly less common than the primary.

Where a term can be attributed to a particular subculture or is known to have originated there, we have tried to so indicate. Here is a list of abbreviations used in etymologies: Berkeley

University of California at Berkeley Cambridge the university in England (*not* the city in Massachusetts where MIT happens to be located!)

BBN

Bolt, Beranek & Newman

CMU

Carnegie-Mellon University

Commodore

Commodore Business Machines

DEC

The Digital Equipment Corporation

Fairchild

The Fairchild Instruments Palo Alto development group Fidonet See the {Fidonet} entry

IBM

International Business Machines

MIT

Massachusetts Institute of Technology; esp. the legendary MIT AI Lab culture of roughly 1971 to 1983 and its feeder groups, including the Tech Model Railroad Club

NRL

Naval Research Laboratories

NYU

New York University

OED

The Oxford English Dictionary

Purdue

Purdue University

SAIL

Stanford Artificial Intelligence Laboratory (at Stanford University)

SI

From Syst`eme International, the name for the standard conventions of metric nomenclature used in the sciences Stanford Stanford University

Sun

Sun Microsystems

TMRC

Some MITisms go back as far as the Tech Model Railroad Club (TMRC) at MIT c. 1960. Material marked TMRC is from `An Abridged Dictionary of the TMRC Language', originally compiled by Pete Samson in 1959

UCLA

University of California at Los Angeles UK the United Kingdom (England, Wales, Scotland, Northern Ireland) USENET See the {USENET} entry

WPI

Worcester Polytechnic Institute, site of a very active community of PDP-10 hackers during the 1970s

XEROX PARC

XEROX's Palo Alto Research Center, site of much pioneering research in user interface design and networking Yale Yale University

Some other etymology abbreviations such as {UNIX} and {PDP-10}

refer to technical cultures surrounding specific operating systems, processors, or other environments. The fact that a term is labelled with any one of these abbreviations does not necessarily mean its use is confined to that culture. In particular, many terms labelled `MIT'

and `Stanford' are in quite general use. We have tried to give some indication of the distribution of speakers in the usage notes; however, a number of factors mentioned in the introduction conspire to make these indications less definite than might be desirable.

A few new definitions attached to entries are marked [proposed].

These are usually generalizations suggested by editors or USENET

respondents in the process of commenting on previous definitions of those entries. These are not represented as established jargon.

:Format For New Entries:

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All contributions and suggestions about the Jargon File will be considered donations to be placed in the public domain as part of this File, and may be used in subsequent paper editions. Submissions may be edited for accuracy, clarity and concision.

Try to conform to the format already being used --- head-words separated from text by a colon (double colon for topic entries), cross-references in curly brackets (doubled for topic entries), pronunciations in slashes, etymologies in square brackets, single-space after definition numbers and word classes, etc. Stick to the standard ASCII character set (7-bit printable, no high-half characters or [nt]roff/TeX/Scribe escapes), as one of the versions generated from the master file is an info document that has to be viewable on a character tty.

We are looking to expand the file's range of technical specialties covered.

There are doubtless rich veins of jargon yet untapped in the scientific computing, graphics, and networking hacker communities; also in numerical analysis, computer architectures and VLSI design, language design, and many other related fields. Send us your jargon!

We are not interested in straight technical terms explained by textbooks or technical dictionaries unless an entry illuminates `underground' meanings or aspects not covered by official histories.

We are also not interested in `joke' entries --- there is a lot of humor in the file but it must flow naturally out of the explanations of what hackers do and how they think.

It is OK to submit items of jargon you have originated if they have spread to the point of being used by people who are not personally acquainted with you. We prefer items to be attested by independent submission from two different sites.

The Jargon File will be regularly maintained and re-posted from now on and will include a version number. Read it, pass it around, contribute --- this is your monument!

The Jargon Lexicon

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

:ABEND: [ABnormal END] /ah'bend/, /*-bend'/ n. 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 calledabend' 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. 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 inA' derive from historical use of the term accumulator' (and not, actually, fromarithmetic'). Confusingly, though, an A' register name prefix may also stand foraddress', 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}.

[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").

:ad-hockery: /ad-hok'*r-ee/ [Purdue] n. 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 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