Chapter 27

green card:

green lightning:

green machine:

Green's Theorem:

greenbar:

grep:

gribble:

grilf:

grind:

grind crank:

gripenet:

gritch:

grok:

gronk:

gronk out:

gronked:

grovel:

grue:

grunge:

gubbish:

Guido:

guiltware:

gumby:

gun:

gunch:

gunpowder chicken:

gurfle:

guru:

guru meditation:

gweep:

Node:G, Next:g-file, Previous:fuzzball, Up:= G =

G pref.,suff.

[SI] See quantifiers.

Node:g-file, Next:gabriel, Previous:G, Up:= G =

g-file n.

[Commodore BBS culture] Any file that is written with the intention of being read by a human rather than a machine, such as the Jargon File, documentation, humor files, hacker lore, and technical materials.

This term survives from the nearly forgotten Commodore 64 underground and BBS community. In the early 80s, C-Net had emerged as the most popular C64 BBS software for systems which encouraged messaging (as opposed to file transfer). There were three main options for files: Program files (p-files), which served the same function as `doors' in today's systems, UD files (the user upload/download section), and g-files. Anything that was meant to be read was included in g-files.

Node:gabriel, Next:gag, Previous:g-file, Up:= G =

gabriel /gay'bree-*l/ n.

[for Dick Gabriel, SAIL LISP hacker and volleyball fanatic] An unnecessary (in the opinion of the opponent) stalling tactic, e.g., tying one's shoelaces or combing one's hair repeatedly, asking the time, etc. Also used to refer to the perpetrator of such tactics. Also, `pulling a Gabriel', `Gabriel mode'.

Node:gag, Next:gang bang, Previous:gabriel, Up:= G =

gag vi.

Equivalent to choke, but connotes more disgust. "Hey, this is FORTRAN code. No wonder the C compiler gagged." See also barf.

Node:gang bang, Next:garbage collect, Previous:gag, Up:= G =

gang bang n.

The use of large numbers of loosely coupled programmers in an attempt to wedge a great many features into a product in a short time. Though there have been memorable gang bangs (e.g., that over-the-weekend assembler port mentioned in Steven Levy's "Hackers"), most are perpetrated by large companies trying to meet deadlines; the inevitable result is enormous buggy masses of code entirely lacking in orthogonality. When market-driven managers make a list of all the features the competition has and assign one programmer to implement each, the probability of maintaining a coherent (or even functional) design goes infinitesimal. See also firefighting, Mongolian Hordes technique, Conway's Law.

Node:garbage collect, Next:garply, Previous:gang bang, Up:= G =

garbage collect vi.

(also `garbage collection', n.) See GC.

Node:garply, Next:gas, Previous:garbage collect, Up:= G =

garply /gar'plee/ n.

[Stanford] Another metasyntactic variable (see foo); once popular among SAIL hackers.

Node:gas, Next:gaseous, Previous:garply, Up:= G =

gas

[as in `gas chamber'] 1. interj. A term of disgust and hatred, implying that gas should be dispensed in generous quantities, thereby exterminating the source of irritation. "Some loser just reloaded the system for no reason! Gas!" 2. interj. A suggestion that someone or something ought to be flushed out of mercy. "The system's getting wedged every few minutes. Gas!" 3. vt. To flush (sense 1). "You should gas that old crufty software." 4. [IBM] n. Dead space in nonsequentially organized files that was occupied by data that has since been deleted; the compression operation that removes it is called `degassing' (by analogy, perhaps, with the use of the same term in vacuum technology). 5. [IBM] n. Empty space on a disk that has been clandestinely allocated against future need.

Node:gaseous, Next:Gates's Law, Previous:gas, Up:= G =

gaseous adj.

Deserving of being gassed. Disseminated by Geoff Goodfellow while at SRI; became particularly popular after the Moscone-Milk killings in San Francisco, when it was learned that the defendant Dan White (a politician who had supported Proposition 7) would get the gas chamber under Proposition 7 if convicted of first-degree murder (he was eventually convicted of manslaughter).

Node:Gates's Law, Next:gawble, Previous:gaseous, Up:= G =

Gates's Law

"The speed of software halves every 18 months." This oft-cited law is an ironic comment on the tendency of software bloat to outpace the every-18-month doubling in hardware caopacity per dollar predicted by Moore's Law. The reference is to Bill Gates; Microsoft is widely considered among the worst if not the worst of the perpetrators of bloat.

Node:gawble, Next:GC, Previous:Gates's Law, Up:= G =

gawble /gaw'bl/ n.

See chawmp.

Node:GC, Next:GCOS, Previous:gawble, Up:= G =

GC /G-C/

[from LISP terminology; `Garbage Collect'] 1. vt. To clean up and throw away useless things. "I think I'll GC the top of my desk today." When said of files, this is equivalent to GFR. 2. vt. To recycle, reclaim, or put to another use. 3. n. An instantiation of the garbage collector process.

`Garbage collection' is computer-science techspeak for a particular class of strategies for dynamically but transparently reallocating computer memory (i.e., without requiring explicit allocation and deallocation by higher-level software). One such strategy involves periodically scanning all the data in memory and determining what is no longer accessible; useless data items are then discarded so that the memory they occupy can be recycled and used for another purpose. Implementations of the LISP language usually use garbage collection.

In jargon, the full phrase is sometimes heard but the abbrev GC is more frequently used because it is shorter. Note that there is an ambiguity in usage that has to be resolved by context: "I'm going to garbage-collect my desk" usually means to clean out the drawers, but it could also mean to throw away or recycle the desk itself.

Node:GCOS, Next:GECOS, Previous:GC, Up:= G =

GCOS /jee'kohs/ n.

A quick-and-dirty clone of System/360 DOS that emerged from GE around 1970; originally called GECOS (the General Electric Comprehensive Operating System). Later kluged to support primitive timesharing and transaction processing. After the buyout of GE's computer division by Honeywell, the name was changed to General Comprehensive Operating System (GCOS). Other OS groups at Honeywell began referring to it as `God's Chosen Operating System', allegedly in reaction to the GCOS crowd's uninformed and snotty attitude about the superiority of their product. All this might be of zero interest, except for two facts: (1) The GCOS people won the political war, and this led in the orphaning and eventual death of Honeywell Multics, and (2) GECOS/GCOS left one permanent mark on Unix. Some early Unix systems at Bell Labs used GCOS machines for print spooling and various other services; the field added to /etc/passwd to carry GCOS ID information was called the `GECOS field' and survives today as the pw_gecos member used for the user's full name and other human-ID information. GCOS later played a major role in keeping Honeywell a dismal also-ran in the mainframe market, and was itself mostly ditched for Unix in the late 1980s when Honeywell began to retire its aging big iron designs.

Node:GECOS, Next:gedanken, Previous:GCOS, Up:= G =

GECOS /jee'kohs/ n.

See GCOS.

Node:gedanken, Next:geef, Previous:GECOS, Up:= G =

gedanken /g*-dahn'kn/ adj.

Ungrounded; impractical; not well-thought-out; untried; untested.

`Gedanken' is a German word for `thought'. A thought experiment is one you carry out in your head. In physics, the term `gedanken experiment' is used to refer to an experiment that is impractical to carry out, but useful to consider because it can be reasoned about theoretically. (A classic gedanken experiment of relativity theory involves thinking about a man in an elevator accelerating through space.) Gedanken experiments are very useful in physics, but must be used with care. It's too easy to idealize away some important aspect of the real world in constructing the `apparatus'.

Among hackers, accordingly, the word has a pejorative connotation. It is typically used of a project, especially one in artificial intelligence research, that is written up in grand detail (typically as a Ph.D. thesis) without ever being implemented to any great extent. Such a project is usually perpetrated by people who aren't very good hackers or find programming distasteful or are just in a hurry. A `gedanken thesis' is usually marked by an obvious lack of intuition about what is programmable and what is not, and about what does and does not constitute a clear specification of an algorithm. See also AI-complete, DWIM.

Node:geef, Next:geek code, Previous:gedanken, Up:= G =

geef v.

[ostensibly from `gefingerpoken'] vt. Syn. mung. See also blinkenlights.

Node:geek code, Next:geek out, Previous:geef, Up:= G =

geek code n.

(also "Code of the Geeks"). A set of codes commonly used in sig blocks to broadcast the interests, skills, and aspirations of the poster. Features a G at the left margin followed by numerous letter codes, often suffixed with plusses or minuses. Because many net users are involved in computer science, the most common prefix is `GCS'. To see a copy of the current code, browse http://www.geekcode.com. Here is a sample geek code (that of Robert Hayden, the code's inventor) from that page:

BEGIN GEEK CODE BLOCK----- Version: 3.1 GED/J d-- s:++>: a- C++(++++)$ ULUO++ P+>+++ L++ !E---- W+(---) N+++ o+ K+++ w+(---) O- M+$>++ V-- PS++(+++)>$ PE++(+)>$ Y++ PGP++ t- 5+++ X++ R+++>$ tv+ b+ DI+++ D+++ G+++++>$ e++$>++++ h r-- y+** ------END GEEK CODE BLOCK------

The geek code originated in 1993; it was inspired (according to the inventor) by previous "bear", "smurf" and "twink" style-and-sexual-preference codes from lesbian and gay newsgroups. It has in turn spawned imitators; there is now even a "Saturn geek code" for owners of the Saturn car. See also computer geek.

Node:geek out, Next:gen, Previous:geek code, Up:= G =

geek out vi.

To temporarily enter techno-nerd mode while in a non-hackish context, for example at parties held near computer equipment. Especially used when you need to do or say something highly technical and don't have time to explain: "Pardon me while I geek out for a moment." See computer geek; see also propeller head.

Node:gen, Next:gender mender, Previous:geek out, Up:= G =

gen /jen/ n.,v.

Short for generate, used frequently in both spoken and written contexts.

Node:gender mender, Next:General Public Virus, Previous:gen, Up:= G =

gender mender n.

[common] A cable connector shell with either two male or two female connectors on it, used to correct the mismatches that result when some loser didn't understand the RS232C specification and the distinction between DTE and DCE. Used esp. for RS-232C parts in either the original D-25 or the IBM PC's bogus D-9 format. Also called `gender bender', `gender blender', `sex changer', and even `homosexual adapter;' however, there appears to be some confusion as to whether a `male homosexual adapter' has pins on both sides (is doubly male) or sockets on both sides (connects two males).

Node:General Public Virus, Next:generate, Previous:gender mender, Up:= G =

General Public Virus n.

Pejorative name for some versions of the GNU project copyleft or General Public License (GPL), which requires that any tools or apps incorporating copylefted code must be source-distributed on the same anti-proprietary terms as GNU stuff. Thus it is alleged that the copyleft `infects' software generated with GNU tools, which may in turn infect other software that reuses any of its code. The Free Software Foundation's official position as of January 1991 is that copyright law limits the scope of the GPL to "programs textually incorporating significant amounts of GNU code", and that the `infection' is not passed on to third parties unless actual GNU source is transmitted. Nevertheless, widespread suspicion that the copyleft language is `boobytrapped' has caused many developers to avoid using GNU tools and the GPL. Changes in the language of the version 2.0 GPL did not eliminate this problem.

Node:generate, Next:Genius From Mars Technique, Previous:General Public Virus, Up:= G =

generate vt.

To produce something according to an algorithm or program or set of rules, or as a (possibly unintended) side effect of the execution of an algorithm or program. The opposite of parse. This term retains its mechanistic connotations (though often humorously) when used of human behavior. "The guy is rational most of the time, but mention nuclear energy around him and he'll generate infinite flamage."

Node:Genius From Mars Technique, Next:gensym, Previous:generate, Up:= G =

Genius From Mars Technique n.

[TMRC] A visionary quality which enables one to ignore the standard approach and come up with a totally unexpected new algorithm. An attack on a problem from an offbeat angle that no one has ever thought of before, but that in retrospect makes total sense. Compare grok, zen.

Node:gensym, Next:Get a life!, Previous:Genius From Mars Technique, Up:= G =

gensym /jen'sim/

[from MacLISP for `generated symbol'] 1. v. To invent a new name for something temporary, in such a way that the name is almost certainly not in conflict with one already in use. 2. n. The resulting name. The canonical form of a gensym is `Gnnnn' where nnnn represents a number; any LISP hacker would recognize G0093 (for example) as a gensym. 3. A freshly generated data structure with a gensymmed name. Gensymmed names are useful for storing or uniquely identifying crufties (see cruft).

Node:Get a life!, Next:Get a real computer!, Previous:gensym, Up:= G =

Get a life! imp.

Hacker-standard way of suggesting that the person to whom it is directed has succumbed to terminal geekdom (see computer geek). Often heard on Usenet, esp. as a way of suggesting that the target is taking some obscure issue of theology too seriously. This exhortation was popularized by William Shatner on a 1987 "Saturday Night Live" episode in a speech that ended "Get a life!", but some respondents believe it to have been in use before then. It was certainly in wide use among hackers for years before achieving mainstream currency via the sitcom "Get A Life" in 1990.

Node:Get a real computer!, Next:GFR, Previous:Get a life!, Up:= G =

Get a real computer! imp.

Typical hacker response to news that somebody is having trouble getting work done on a system that (a) is single-tasking, (b) has no hard disk, or (c) has an address space smaller than 16 megabytes. This is as of early 1996; note that the threshold for `real computer' rises with time. See bitty box and toy.

Node:GFR, Next:gib, Previous:Get a real computer!, Up:= G =

GFR /G-F-R/ vt.

[ITS: from `Grim File Reaper', an ITS and LISP Machine utility] To remove a file or files according to some program-automated or semi-automatic manual procedure, especially one designed to reclaim mass storage space or reduce name-space clutter (the original GFR actually moved files to tape). Often generalized to pieces of data below file level. "I used to have his phone number, but I guess I GFRed it." See also prowler, reaper. Compare GC, which discards only provably worthless stuff.

Node:gib, Next:GIFs at 11, Previous:GFR, Up:= G =

gib /jib/

1. vi. To destroy utterly. Like frag, but much more violent and final. "There's no trace left. You definitely gibbed that bug". 2. n. Remnants after total obliteration.

Originated first by id software in the game Quake. It's short for giblets (thus pronounced "jib"), and referred to the bloody remains of slain opponents. Eventually the word was verbed, and leaked into general usage afterward.

Node:GIFs at 11, Next:gig, Previous:gib, Up:= G =

GIFs at 11

[Fidonet] Fidonet alternative to film at 11, especially in echoes (Fidonet topic areas) where uuencoded GIFs are permitted. Other formats, especially JPEG and MPEG, may be referenced instead.

Node:gig, Next:giga-, Previous:GIFs at 11, Up:= G =

gig /jig/ or /gig/ n.

[SI] See quantifiers.

Node:giga-, Next:GIGO, Previous:gig, Up:= G =

giga- /ji'ga/ or /gi'ga/ pref.

[SI] See quantifiers.

Node:GIGO, Next:gilley, Previous:giga-, Up:= G =

GIGO /gi:'goh/ [acronym]

1. `Garbage In, Garbage Out' -- usually said in response to lusers who complain that a program didn't "do the right thing" when given imperfect input or otherwise mistreated in some way. Also commonly used to describe failures in human decision making due to faulty, incomplete, or imprecise data. 2. `Garbage In, Gospel Out': this more recent expansion is a sardonic comment on the tendency human beings have to put excessive trust in `computerized' data.

Node:gilley, Next:gillion, Previous:GIGO, Up:= G =

gilley n.

[Usenet] The unit of analogical bogosity. According to its originator, the standard for one gilley was "the act of bogotoficiously comparing the shutting down of 1000 machines for a day with the killing of one person". The milligilley has been found to suffice for most normal conversational exchanges.

Node:gillion, Next:ginger, Previous:gilley, Up:= G =

gillion /gil'y*n/ or /jil'y*n/ n.

[formed from giga- by analogy with mega/million and tera/trillion] 10^9. Same as an American billion or a British `milliard'. How one pronounces this depends on whether one speaks giga- with a hard or soft `g'.

Node:ginger, Next:GIPS, Previous:gillion, Up:= G =

ginger n.

See saga.

Node:GIPS, Next:glark, Previous:ginger, Up:= G =

GIPS /gips/ or /jips/ n.

[analogy with MIPS] Giga-Instructions per Second (also possibly `Gillions of Instructions per Second'; see gillion). In 1991, this is used of only a handful of highly parallel machines, but this is expected to change. Compare KIPS.

Node:glark, Next:glass, Previous:GIPS, Up:= G =

glark /glark/ vt.

To figure something out from context. "The System III manuals are pretty poor, but you can generally glark the meaning from context." Interestingly, the word was originally `glork'; the context was "This gubblick contains many nonsklarkish English flutzpahs, but the overall pluggandisp can be glorked [sic] from context" (David Moser, quoted by Douglas Hofstadter in his "Metamagical Themas" column in the January 1981 "Scientific American"). It is conjectured that hacker usage mutated the verb to `glark' because glork was already an established jargon term (some hackers do report using the original term). Compare grok, zen.

Node:glass, Next:glass tty, Previous:glark, Up:= G =

glass n.

[IBM] Synonym for silicon.

Node:glass tty, Next:glassfet, Previous:glass, Up:= G =

glass tty /glas T-T-Y/ or /glas ti'tee/ n.

A terminal that has a display screen but which, because of hardware or software limitations, behaves like a teletype or some other printing terminal, thereby combining the disadvantages of both: like a printing terminal, it can't do fancy display hacks, and like a display terminal, it doesn't produce hard copy. An example is the early `dumb' version of Lear-Siegler ADM 3 (without cursor control). See tube, tty; compare dumb terminal, smart terminal. See "TV Typewriters" (Appendix A) for an interesting true story about a glass tty.

Node:glassfet, Next:glitch, Previous:glass tty, Up:= G =

glassfet /glas'fet/ n.

[by analogy with MOSFET, the acronym for `Metal-Oxide-Semiconductor Field-Effect Transistor'] Syn. firebottle, a humorous way to refer to a vacuum tube.

Node:glitch, Next:glob, Previous:glassfet, Up:= G =

glitch /glich/

[very common; from German `glitschig' to slip, via Yiddish `glitshen', to slide or skid] 1. n. A sudden interruption in electric service, sanity, continuity, or program function. Sometimes recoverable. An interruption in electric service is specifically called a `power glitch' (also power hit), of grave concern because it usually crashes all the computers. In jargon, though, a hacker who got to the middle of a sentence and then forgot how he or she intended to complete it might say, "Sorry, I just glitched". 2. vi. To commit a glitch. See gritch. 3. vt. [Stanford] To scroll a display screen, esp. several lines at a time. WAITS terminals used to do this in order to avoid continuous scrolling, which is distracting to the eye. 4. obs. Same as magic cookie, sense 2.

All these uses of `glitch' derive from the specific technical meaning the term has in the electronic hardware world, where it is now techspeak. A glitch can occur when the inputs of a circuit change, and the outputs change to some random value for some very brief time before they settle down to the correct value. If another circuit inspects the output at just the wrong time, reading the random value, the results can be very wrong and very hard to debug (a glitch is one of many causes of electronic heisenbugs).

Node:glob, Next:glork, Previous:glitch, Up:= G =

glob /glob/, not /glohb/ v.,n.

[Unix; common] To expand special characters in a wildcarded name, or the act of so doing (the action is also called `globbing'). The Unix conventions for filename wildcarding have become sufficiently pervasive that many hackers use some of them in written English, especially in email or news on technical topics. Those commonly encountered include the following:

*

wildcard for any string (see also UN*X)

?

wildcard for any single character (generally read this way only at the beginning or in the middle of a word)

[]

delimits a wildcard matching any of the enclosed characters

{}

alternation of comma-separated alternatives; thus, `foo{baz,qux}' would be read as `foobaz' or `fooqux'

Some examples: "He said his name was [KC]arl" (expresses ambiguity). "I don't read talk.politics.*" (any of the talk.politics subgroups on Usenet). Other examples are given under the entry for X. Note that glob patterns are similar, but not identical, to those used in regexps.

Historical note: The jargon usage derives from glob, the name of a subprogram that expanded wildcards in archaic pre-Bourne versions of the Unix shell.

Node:glork, Next:glue, Previous:glob, Up:= G =

glork /glork/

1. interj. Term of mild surprise, usually tinged with outrage, as when one attempts to save the results of two hours of editing and finds that the system has just crashed. 2. Used as a name for just about anything. See foo. 3. vt. Similar to glitch, but usually used reflexively. "My program just glorked itself." 4. Syn. for glark, which see.

Node:glue, Next:gnarly, Previous:glork, Up:= G =

glue n.

Generic term for any interface logic or protocol that connects two component blocks. For example, Blue Glue is IBM's SNA protocol, and hardware designers call anything used to connect large VLSI's or circuit blocks `glue logic'.

Node:gnarly, Next:GNU, Previous:glue, Up:= G =

gnarly /nar'lee/ adj.

Both obscure and hairy (sense 1). "Yow! -- the tuned assembler implementation of BitBlt is really gnarly!" From a similar but less specific usage in surfer slang.

Node:GNU, Next:gnubie, Previous:gnarly, Up:= G =

GNU /gnoo/, not /noo/

1. [acronym: `GNU's Not Unix!', see recursive acronym] A Unix-workalike development effort of the Free Software Foundation headed by Richard Stallman. GNU EMACS and the GNU C compiler, two tools designed for this project, have become very popular in hackerdom and elsewhere. The GNU project was designed partly to proselytize for RMS's position that information is community property and all software source should be shared. One of its slogans is "Help stamp out software hoarding!" Though this remains controversial (because it implicitly denies any right of designers to own, assign, and sell the results of their labors), many hackers who disagree with RMS have nevertheless cooperated to produce large amounts of high-quality software for free redistribution under the Free Software Foundation's imprimatur. The GNU project has a web page at http://www.gnu.org. See EMACS, copyleft, General Public Virus, Linux. 2. Noted Unix hacker John Gilmore, founder of Usenet's anarchic alt.* hierarchy.