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andfolders' --- ESR]

:foo: /foo/ 1. interj. Term of disgust. 2. Used very generally as a sample name for absolutely anything, esp. programs and files (esp. scratch files). 3. First on the standard list of {metasyntactic variable}s used in syntax examples. See also {bar}, {baz}, {qux}, {quux}, {corge}, {grault}, {garply}, {waldo}, {fred}, {plugh}, {xyzzy}, {thud}.

The etymology of hackish foo' is obscure. When used in connection withbar' it is generally traced to the WWII-era Army slang acronym FUBAR (`Fucked Up Beyond All Recognition'), later bowdlerized to {foobar}. (See also {FUBAR}).

However, the use of the word `foo' itself has more complicated antecedents, including a long history in comic strips and cartoons.

The old "Smokey Stover" comic strips by Bill Holman often included the word FOO', in particular on license plates of cars; allegedly,FOO' and `BAR' also occurred in Walt Kelly's "Pogo" strips. In the 1938 cartoon "Daffy Doc", a very early version of Daffy Duck holds up a sign saying "SILENCE IS

FOO!"; oddly, this seems to refer to some approving or positive affirmative use of foo. It has been suggested that this might be related to the Chinese word fu' (sometimes transliteratedfoo'), which can mean "happiness" when spoken with the proper tone (the lion-dog guardians flanking the steps of many Chinese restaurants are properly called "fu dogs").

It is even possible that hacker usage actually springs from FOO, Lampoons and Parody', the title of a comic book first issued in September 1958; the byline readC. Crumb' but the style of the art suggests this may well have been a sort-of pseudonym for noted weird-comix artist Robert Crumb. The title FOO was featured in large letters on the front cover. What the word meant to Mr.

Crumb is anybody's guess.

An old-time member reports that in the 1959 `Dictionary of the TMRC Language', compiled at {TMRC} there was an entry that went something like this:

FOO: The first syllable of the sacred chant phrase "FOO MANE PADME HUM." Our first obligation is to keep the foo counters turning.

For more about the legendary foo counters, see {TMRC}. Almost the entire staff of what became the MIT AI LAB was involved with TMRC, and probably picked the word up there.

Very probably, hackish foo' had no single origin and derives through all these channels from Yiddishfeh' and/or English `fooey'.

:foobar: n. Another common {metasyntactic variable}; see {foo}.

Hackers do not generally use this to mean {FUBAR} in either the slang or jargon sense.

:fool: n. As used by hackers, specifically describes a person who habitually reasons from obviously or demonstrably incorrect premises and cannot be persuaded by evidence to do otherwise; it is not generally used in its other senses, i.e., to describe a person with a native incapacity to reason correctly, or a clown. Indeed, in hackish experience many fools are capable of reasoning all too effectively in executing their errors. See also {cretin}, {loser}, {fool file, the}.

:fool file, the: [USENET] n. A notional repository of all the most dramatically and abysmally stupid utterances ever. There is a subgenre of {sig block}s that consists of the header "From the fool file:" followed by some quote the poster wishes to represent as an immortal gem of dimwittery; for this to be really effective, the quote has to be so obviously wrong as to be laughable. More than one USENETter has achieved an unwanted notoriety by being quoted in this way.

:Foonly: n. 1. The {PDP-10} successor that was to have been built by the Super Foonly project at the Stanford Artificial Intelligence Laboratory along with a new operating system. The intention was to leapfrog from the old DEC timesharing system SAIL was running to a new generation, bypassing TENEX which at that time was the ARPANET

standard. ARPA funding for both the Super Foonly and the new operating system was cut in 1974. Most of the design team went to DEC and contributed greatly to the design of the PDP-10 model KL10.

The name of the company formed by Dave Poole, one of the principal Super Foonly designers, and one of hackerdom's more colorful personalities. Many people remember the parrot which sat on Poole's shoulder and was a regular companion. 3. Any of the machines built by Poole's company. The first was the F-1 (a.k.a.

Super Foonly), which was the computational engine used to create the graphics in the movie "TRON". The F-1 was the fastest PDP-10 ever built, but only one was ever made. The effort drained Foonly of its financial resources, and they turned towards building smaller, slower, and much less expensive machines. Unfortunately, these ran not the popular {TOPS-20} but a TENEX variant called Foonex; this seriously limited their market. Also, the machines shipped were actually wire-wrapped engineering prototypes requiring individual attention from more than usually competent site personnel, and thus had significant reliability problems. Poole's legendary temper and unwillingness to suffer fools gladly did not help matters. By the time of the Jupiter project cancellation in 1983 Foonly's proposal to build another F-1 was eclipsed by the {Mars}, and the company never quite recovered. See the {Mars} entry for the continuation and moral of this story.

:footprint: n. 1. The floor or desk area taken up by a piece of hardware. 2. [IBM] The audit trail (if any) left by a crashed program (often in plural, `footprints'). See also {toeprint}.

:for free: adj. Said of a capability of a programming language or hardware equipment that is available by its design without needing cleverness to implement: "In APL, we get the matrix operations for free." "And owing to the way revisions are stored in this system, you get revision trees for free." Usually it refers to a serendipitous feature of doing things a certain way (compare {big win}), but it may refer to an intentional but secondary feature.

:for the rest of us: [from the Mac slogan "The computer for the rest of us"] adj. 1. Used to describe a {spiffy} product whose affordability shames other comparable products, or (more often) used sarcastically to describe {spiffy} but very overpriced products. 2. Describes a program with a limited interface, deliberately limited capabilities, non-orthogonality, inability to compose primitives, or any other limitation designed to not confuse' a na"ive user. This places an upper bound on how far that user can go before the program begins to get in the way of the task instead of helping accomplish it. Used in reference to Macintosh software which doesn't provide obvious capabilities because it is thought that the poor lusers might not be able to handle them. Becomesthe rest of them' when used in third-party reference; thus, "Yes, it is an attractive program, but it's designed for The Rest Of Them" means a program that superficially looks neat but has no depth beyond the surface flash.

See also {WIMP environment}, {Macintrash}, {point-and-drool interface}, {user-friendly}.

:for values of: [MIT] A common rhetorical maneuver at MIT is to use any of the canonical {random numbers} as placeholders for variables. "The max function takes 42 arguments, for arbitrary values of 42." "There are 69 ways to leave your lover, for 69 = 50." This is especially likely when the speaker has uttered a random number and realizes that it was not recognized as such, but even `non-random' numbers are occasionally used in this fashion. A related joke is that pi equals 3 --- for small values of pi and large values of 3.

Historical note: this usage probably derives from the programming language MAD (Michigan Algorithm Decoder), an Algol-like language that was the most common choice among mainstream (non-hacker) users at MIT in the mid-60s. It had a control structure FOR VALUES OF X

= 3, 7, 99 DO ... that would repeat the indicated instructions for each value in the list (unlike the usual FOR that only works for arithmetic sequences of values). MAD is long extinct, but similar for-constructs still flourish (e.g. in UNIX's shell languages).

:fora: pl.n. Plural of {forum}.

:foreground: [UNIX] vt. To foreground a task is to bring it to the top of one's {stack} for immediate processing, and hackers often use it in this sense for non-computer tasks. "If your presentation is due next week, I guess I'd better foreground writing up the design document."

Technically, on a time-sharing system, a task executing in foreground is one able to accept input from and return output to the user; oppose {background}. Nowadays this term is primarily associated with {{UNIX}}, but it appears first to have been used in this sense on OS/360. Normally, there is only one foreground task per terminal (or terminal window); having multiple processes simultaneously reading the keyboard is a good way to {lose}.

:fork bomb: [UNIX] n. A particular species of {wabbit} that can be written in one line of C (main() {for(;;)fork();}') or shell ($0 & $0 &') on any UNIX system, or occasionally created by an egregious coding bug. A fork bomb process explodes' by recursively spawning copies of itself (using the UNIX system callfork(2)'). Eventually it eats all the process table entries and effectively wedges the system. Fortunately, fork bombs are relatively easy to spot and kill, so creating one deliberately seldom accomplishes more than to bring the just wrath of the gods down upon the perpetrator. See also {logic bomb}.

:forked: [UNIX; prob. influenced by a mainstream expletive] adj.

Terminally slow, or

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