term% ls -F
term% cat index.txt
AOS (aus (East coast) ay-ahs (West coast)) [based on a PDP-10
   increment instruction] v. To increase the amount of something.
   "Aos the campfire."  Usage: considered silly.  See SOS.

ANGLE BRACKETS (primarily MIT) n. Either of the characters "<" and
   ">".  See BROKET.

ARG n. Abbreviation for "argument" (to a function), used so often as
   to have become a new word.

AUTOMAGICALLY adv. Automatically, but in a way which, for some reason
   (typically because it is too complicated, or too ugly, or perhaps
   even too trivial), I don't feel like explaining to you.  See MAGIC.
   Example: Some programs which produce XGP output files spool them

BAGBITER 1. n. Equipment or program that fails, usually
   intermittently.  2. BAGBITING: adj. Failing hardware or software.
   "This bagbiting system won't let me get out of spacewar."  Usage:
   verges on obscenity.  Grammatically separable; one may speak of
   "biting the bag".  Synonyms: LOSER, LOSING, CRETINOUS, BLETCHEROUS,

BANG (U of I) n. Spoken abbreviation for the exclamation point. See EXCL.

BAR 1. The second metasyntactic variable, after FOO.  "Suppose we have
   two functions FOO and BAR.  FOO calls BAR..."  2. Often appended to
   FOO to produce FOOBAR.

BARF 1. interj. Term of disgust.  See BLETCH.  2. v. choke, as on
   input.  May mean to give an error message.  "The function `='
   compares two fixnums or two flonums, and barfs on anything else."
   3. BARFULOUS, BARFUCIOUS: adj. said of something which would make
   anyone barf, if only for aesthetic reasons.

BIN [short for BINARY; used as a second file name on ITS] 1. n.
   BINARY.  2. BIN FILE: a file containing the BIN for a program.
   Usage: used at MIT, which runs on ITS.  The equivalent term at
   Stanford is DMP (pronounced "dump") FILE.  Other names used include
   SAV ("save") FILE (DEC and Tenex), SHR ("share") and LOW FILES
   (DEC), and EXE ("ex'ee") FILE (DEC and Twenex).  Also in this
   category are the input files to the various flavors of linking
   loaders (LOADER, LINK-10, STINK), called REL FILES.

BINARY n. The object code for a program.

BLETCH [from German "erbrechen", to vomit] 1. interj. Term of
   disgust.  2. BLETCHEROUS: adj. Disgusting in design or function.
   "This keyboard is bletcherous!"  Usage: slightly comic.

BLT (blit, very rarely belt) [based on the PDP-10 block transfer
   instruction; confusing to users of the PDP-11] 1. v. To transfer a
   large contiguous package of information from one place to another.
   2. THE BIG BLT: n. Shuffling operation on the PDP-10 under some
   operating systems that consumes a significant amount of computer
   time.  3. (usually pronounced B-L-T) n. Sandwich containing bacon,
   lettuce, and tomato.

BOGUS (WPI, Yale, Stanford) adj. 1. Non-functional.  "Your patches are
   bogus."  2. Useless.  "OPCON is a bogus program."  3. False.  "Your
   arguments are bogus."  4. Incorrect.  "That algorithm is bogus."
   5. Silly.  "Stop writing those bogus sagas."  [This word seems to
   have some, but not all, of the connotations of RANDOM.]

BRAIN-DAMAGED [generalization of "Honeywell Brain Damage" (HBD), a
   theoretical disease invented to explain certain utter cretinisms in
   Multics] adj. Obviously wrong; cretinous; demented.  There is an
   implication that the person responsible must have suffered brain
   damage, because he should have known better.  Calling something
   brain-damaged is really bad; it also implies it is unusable.

BREAK v. 1. To cause to be broken (in any sense).  "Your latest patch
   to the system broke the TELNET server."  2. (Of a program) To stop
   temporarily, so that it may be examined for debugging purposes.
   The place where it stops is a BREAKPOINT.

BROKEN adj. 1. Not working properly (of programs).  2. Behaving
   strangely; especially (of people), exhibiting extreme depression.

BROKET [by analogy with "bracket": a "broken bracket"] (primarily
   Stanford) n. Either of the characters "<" and ">".  (At MIT these
   are usually called ANGLE BRACKETS.)

BUCKY BITS (primarily Stanford) n. The bits produced by the CTRL and
   META shift keys on a Stanford (or Knight) keyboard.
   DOUBLE BUCKY: adj. Using both the CTRL and META keys.  "The command
   to burn all LEDs is double bucky F."

BUG [from telephone terminology, "bugs in a telephone cable", blamed
   for noisy lines] n. An unwanted and unintended property of a
   program.  See FEATURE.

BUM 1. v. To make highly efficient, either in time or space, often at
   the expense of clarity.  "I managed to bum three more
   instructions."  2. n. A small change to an algorithm to make it
   more efficient.  Usage: somewhat rare.

CANONICAL adj. The usual or standard state or manner of something.

CATATONIA (kat-uh'-toe-nee-uh) n. A condition of suspended animation
   in which the system is in a wedged (CATATONIC) state.

CDR (ku'der) [from LISP] v. With "down", to trace down a list of
   elements.  "Shall we cdr down the agenda?"  Usage: silly.

(CHG,PRJ) (U of I) [Charge/Project pair, a U of I accounting partition]
   n. Any partition or group. "I used to be in Professor Campbell's
   research group, but now I'm in a different (CHG,PRJ)."

CHOMP v. To lose; to chew on something of which more was bitten off
   than one can.  Probably related to gnashing of teeth.  See
   BAGBITER.  A hand gesture commonly accompanies this, consisting of
   the four fingers held together as if in a mitten or hand puppet,
   and the fingers and thumb open and close rapidly to illustrate a
   biting action.  The gesture alone means CHOMP CHOMP (see Verb

CLOSE n. Abbreviation for "close (or right) parenthesis", used when
   necessary to eliminate oral ambiguity.  See OPEN.

COKEBOTTLE n. Any very unusual character.  MIT people complain about
   the "control-meta-cokebottle" commands at SAIL, and SAIL people
   complain about the "altmode-altmode-cokebottle" commands at MIT.

COM MODE (variant: COMM MODE) [from the ITS feature for linking two or
   more terminals together so that text typed on any is echoed on all,
   providing a means of conversation among hackers] n. The state a
   terminal is in when linked to another in this way.  Com mode has a
   special set of jargon words, used to save typing, which are not
   used orally:
        BCNU    Be seeing you.
        BTW     By the way...
        BYE?    Are you ready to unlink?  (This is the standard way to
                end a com mode conversation; the other person types
                BYE to confirm, or else continues the conversation.)
        CUL     See you later.
        EOC     End of conversation, indicating "this is my
                last message."
        FOO?    A greeting, also meaning R U THERE?  Often used in the
                case of unexpected links, meaning also "Sorry if I
                butted in" (linker) or "What's up?" (linkee).
        FYI     For your information...
        GA      Go ahead (used when two people have tried to type
                simultaneously; this cedes the right to type to
                the other).

        HELLOP  A greeting, also meaning R U THERE?  (An instance
                of the "-P" convention.)
        NIL     No (see the main entry for NIL).
        OBTW    Oh, by the way...
        R U THERE?      Are you there?
        SEC     Wait a second (sometimes written SEC...).
        T       Yes (see the main entry for T).
        TNX     Thanks.

    <double CRLF>  When the typing party has finished, he types
                two CRLF's to signal that he is done; this leaves a
                blank line between individual "speeches" in the
                conversation, making it easier to re-read the
                preceding text.
        <name>: When three or more terminals are linked, each speech
                is preceded by the typist's login name and a colon (or
                a hyphen) to indicate who is typing.  The login name
                often is shortened to a unique prefix (possibly a
                single letter) during a very long conversation.

   At Stanford, where the link feature is implemented by "talk loops",
   the term TALK MODE is used in place of COM MODE.  Most of the above
   "sub-jargon" is used at both Stanford and MIT.

   At U of I, the jargon is used by student operators at RJE sites, who
   often have conversations via the IBM RSCS system.

CONNECTOR CONSPIRACY [probably came into prominence with the
   appearance of the KL-10, none of whose connectors match anything
   else] n. The tendency of manufacturers (or, by extension,
   programmers or purveyors of anything) to come up with new products
   which don't fit together with the old stuff, thereby making you buy
   either all new stuff or expensive interface devices.

CONS [from LISP] 1. v. To add a new element to a list.  2. CONS UP:
   v. To synthesize from smaller pieces: "to cons up an example".

CRASH 1. n. A sudden, usually drastic failure.  Most often said of the
   system (q.v., definition #1), sometimes of magnetic disk drives.
   "Three lusers lost their files in last night's disk crash."  A disk
   crash which entails the read/write heads dropping onto the surface
   of the disks and scraping off the oxide may also be referred to as
   a "head crash".  2. v. To fail suddenly.  "Has the system just
   crashed?"  Also used transitively to indicate the cause of the
   crash (usually a person or a program, or both).  "Those idiots
   playing spacewar crashed the system."  Sometimes said of people.

CRETIN 1. n. Congenital loser (q.v.).  2. CRETINOUS: adj. See
   BLETCHEROUS and BAGBITING.  Usage: somewhat ad hominem.

CRLF (cur'lif, sometimes crul'lif) n. A carriage return (CR) followed
   by a line feed (LF).

CROCK n. An awkward feature or programming technique that ought to be
   made cleaner.  Example: Using small integers to represent error
   codes without the program interpreting them to the user is a crock.
   Also, a technique that works acceptably but which is quite prone to
   failure if disturbed in the least, for example depending on the
   machine opcodes having particular bit patterns so that you can use
   instructions as data words too; a tightly woven, almost completely
   unmodifiable structure.

CRUFTY [from "cruddy"] adj. 1. Poorly built, possibly overly complex.
   "This is standard old crufty DEC software".  Hence CRUFT, n. shoddy
   construction.  2. Unpleasant, especially to the touch, often with
   encrusted junk.  Like spilled coffee smeared with peanut butter and
   ketchup.  Hence CRUFT, n. disgusting mess.  3. Generally unpleasant.
   CRUFTY or CRUFTIE n. A small crufty object (see FROB); often one
   which doesn't fit well into the scheme of things.  "A LISP property
   list is a good place to store crufties (or, random cruft)."

CRUNCH v. 1. To process, usually in a time-consuming or complicated
   way.  Connotes an essentially trivial operation which is
   nonetheless painful to perform.  The pain may be due to the
   triviality being imbedded ina loop from 1 to 1000000000.  "FORTRAN
   programs do mostly number crunching."  2. To reduce the size of a
   file by a complicated scheme that produces bit configurations
   completely unrelated to the original data, such as by a Huffman
   code.  (The file ends up looking like a paper document would if
   somebody crunched the paper into a wad.)  Since such compression
   usually takes more computations than simpler methods such as
   counting repeated characters (such as spaces) the term is doubly
   appropriate.  (This meaning is usually used in the construction
   "file crunch(ing)" to distinguish it from "number crunch(ing)".)

CTY (city) n. The terminal physically associated with a computer's
   operating console.

CUSPY [from the DEC acronym CUSP, for Commonly Used System Program,
   i.e., a utility program used by many people] (WPI) adj. 1. (Of a
   program) Well-written.  2. Functionally excellent.  A program which
   performs well and interfaces well to users is cuspy.  See RUDE.

DAEMON (day'mun, dee'mun) [archaic form of "demon", which has slightly
   different connotations (q.v.)] n. A program which is not invoked
   explicitly, but which lays dormant waiting for some condition(s) to
   occur.  The idea is that the perpetrator of the condition need not
   be aware that a daemon is lurking (though often a program will
   commit an action only because it knows that it will implicitly
   invoke a daemon).  For example, writing a file on the lpt spooler's
   directory will invoke the spooling daemon, which prints the file.
   The advantage is that programs which want (in this example) files
   printed need not compete for access to the lpt.  They simply enter
   their implicit requests and let the daemon decide what to do with
   them.  Daemons are usually spawned automatically by the system, and
   may either live forever or be regenerated at intervals.  Usage:
   DAEMON and DEMON (q.v.) are often used interchangeably, but seem to
   have distinct connotations.  DAEMON was introduced to computing by
   CTSS people (who pronounced it dee'mon) and used it to refer to
   what is now called a DRAGON or PHANTOM (q.v.).  The meaning and
   pronunciation have drifted, and we think this glossary reflects
   current usage.

DEADLOCK n. A situation wherein two or more processes are unable to
   proceed because each is waiting for another to do something.  A
   common example is a program communicating to a PTY or STY, which
   may find itself waiting for output from the PTY/STY before sending
   anything more to it, while the PTY/STY is similarly waiting for
   more input from the controlling program before outputting anything.
   (This particular flavor of deadlock is called "starvation".
   Another common flavor is "constipation", where each process is
   trying to send stuff to the other, but all buffers are full because
   nobody is reading anything.)  See DEADLY EMBRACE.

DEADLY EMBRACE n. Same as DEADLOCK (q.v.), though usually used only
   when exactly two processes are involved.  DEADLY EMBRACE is the
   more popular term in Europe; DEADLOCK in the United States.

DEMENTED adj. Yet another term of disgust used to describe a program.
   The connotation in this case is that the program works as designed,
   but the design is bad.  For example, a program that generates large
   numbers of meaningless error messages implying it is on the point
   of imminent collapse.

DEMON (dee'mun) n. A portion of a program which is not invoked
   explicitly, but which lays dormant waiting for some condition(s) to
   occur.  See DAEMON.  The distinction is that demons are usually
   processes within a program, while daemons are usually programs
   running on an operating system.  Demons are particularly common in
   AI programs.  For example, a knowledge manipulation program might
   implement inference rules as demons.  Whenever a new piece of
   knowledge was added, various demons would activate (which demons
   depends on the particular piece of data) and would create
   additional pieces of knowledge by applying their respective
   inference rules to the original piece.  These new pieces could in
   turn activate more demons as the inferences filtered down through
   chains of logic.  Meanwhile the main program could continue with
   whatever its primary task was.

DIKE [from "diagonal cutters"] v. To remove a module or disable it.
   "When in doubt, dike it out."

DMP (dump)  See BIN.

DOWN 1. adj. Not working.  "The up escalator is down."  2. TAKE DOWN,
   BRING DOWN: v. To deactivate, usually for repair work.  See UP.

DRAGON n. (MIT) A program similar to a "daemon" (q.v.), except that it
   is not invoked at all, but is instead used by the system to perform
   various secondary tasks.  A typical example would be an accounting
   program, which keeps track of who is logged in, accumulates load-
   average statistics, etc.  At MIT, all free TV's display a list of
   people logged in, where they are, what they're running, etc. along
   with some random picture (such as a unicorn, Snoopy, or the
   Enterprise) which is generated by the "NAME DRAGON".  See PHANTOM.

DWIM n. A mythical machine instruction, "Do What I Mean,"
   used as a mild curse directed at misbehaving programs.
   Also DAIS ("Do As I Say").

ENGLISH n. The source code for a program, which may be in any
   language, as opposed to BINARY.  Usage: slightly obsolete, used
   mostly by old-time hackers, though recognizable in context.  At
   MIT, directory SYSENG is where the "English" for system programs is
   kept, and SYSBIN, the binaries.  SAIL has many such directories,
   but the canonical one is [CSP,SYS].

EPSILON [from standard mathematical notation for a small quantity] 1.
   n. A small quantity of anything.  "The cost is epsilon."  2. adj.
   Very small, negligible; less than marginal.  "We can get this
   feature for epsilon cost."

EXCH (ex'chuh, ekstch) [from the PDP-10 instruction set] v. To
   exchange two things, each for the other.

EXCL (eks'cul) n. Abbreviation for "exclamation point".  See SEMI,

EXE (ex'ee)  See BIN.

FAULTY adj. Same denotation as "bagbiting", "bletcherous", "losing",
   q.v., but the connotation is much milder.

FEATURE n. 1. A surprising property of a program.  Occasionally docu-
   mented.  To call a property a feature sometimes means the author of
   the program did not consider the particular case, and the program
   makes an unexpected, although not strictly speaking an incorrect
   response.  See BUG.  "That's not a bug, that's a feature!"  A bug
   can be changed to a feature by documenting it.  2. A well-known and
   beloved property; a facility.  Sometimes features are planned, but
   are called crocks by others.  An approximately correct spectrum:

   (These terms are all used to describe programs or portions thereof,
   except for the first two, which are included for completeness.)
   (The last is never actually attained.)

FEEP 1. n. The soft bell of a display terminal (except for a VT-52!);
   a beep.  2. v. To cause the display to make a feep sound.  TTY's do
   not have feeps.  Alternate forms: BEEP, BLEEP, or just about
   anything suitably onomatopoeic.  The term BREEDLE is sometimes
   heard at SAIL, where the terminal bleepers are not particularly
   "soft" (they sound more like the musical equivalent of sticking out
   one's tongue).  The "feeper" on a VT-52 has been compared to the
   sound of a '52 Chevy stripping its gears.

FENCEPOST ERROR n. The discrete equivalent of a boundary condition.
   Often exhibited in programs by iterative loops.  From the following
   problem: "If you build a fence 100 feet long with posts ten feet
   apart, how many posts do you need?"  (Either 9 or 11 is a better
   answer than the obvious 10.) Also OBOE.

FINE (WPI) adj. Good, but not good enough to be CUSPY.  [The word FINE
   is used elsewhere, of course, but without the implicit comparison
   to the higher level implied by CUSPY.]

FLAG DAY [from a bit of Multics history involving a change in the
   ASCII character set originally scheduled for June 14, 1966]
   n. A software change which is neither forward nor backward
   compatible, and which is costly to make and costly to revert.
   "Can we install that without causing a flag day for all users?"

FLAKY adj. Subject to frequent lossages.  See LOSSAGE.

FLAME v. To speak incessantly and/or rabidly on some relatively
   uninteresting subject or with a patently ridiculous attitude.
   FLAME ON: v. To continue to flame.

FLAVOR n. 1. Variety, type, kind.  "DDT commands come in two flavors."
   2. The attribute of causing something to be FLAVORFUL.  "This
   convention yields additional flavor by allowing one to..."

FLAVORFUL adj. Aesthetically pleasing.  See RANDOM and LOSING for
   antonyms.  See also the entry for TASTE.

FLUSH v. 1. To delete something, usually superfluous.  "All that
   nonsense has been flushed."  Standard ITS terminology for aborting
   an output operation.  2. To leave at the end of a day's work (as
   opposed to leaving for a meal).  "I'm going to flush now."  "Time
   to flush."  3. To exclude someone from an activity.

FOO 1. [from Yiddish "feh" or the Anglo-Saxon "fooey!"] interj. Term
   of disgust.  2. [from FUBAR (Fucked Up Beyond All Recognition),
   from WWII, often seen as FOOBAR] Name used for temporary programs,
   or samples of three-letter names.  Other similar words are BAR, BAZ
   (Stanford corruption of BAR), and rarely RAG.  These have been used
   in Pogo as well.  3. Used very generally as a sample name for
   absolutely anything. The old `Smokey Stover' comic strips often
   included the word FOO, in particular on license plates of cars.

FROBNICATE v. To manipulate or adjust, to tweak.  Derived from
   FROBNITZ (q.v.).  Usually abbreviated to FROB.  Thus one has the
   saying "to frob a frob".  See TWEAK and TWIDDLE.  Usage: FROB,
   TWIDDLE, and TWEAK sometimes connote points along a continuum.
   FROB connotes aimless manipulation; TWIDDLE connotes gross
   manipulation, often a coarse search for a proper setting; TWEAK
   connotes fine-tuning.  If someone is turning a knob on an
   oscilloscope, then if he's carefully adjusting it he is probably
   tweaking it; if he is just turning it but looking at the screen he
   is probably twiddling it; but if he's just doing it because turning
   a knob is fun, he's frobbing it.

FROBNITZ, pl. FROBNITZEM (frob'nitsm) n. An unspecified physical
   object, a widget.  Also refers to electronic black boxes.  This
   rare form is usually abbreviated to FROTZ, or more commonly to
   FROB.  Also used is FROBNULE.

FROG (variant: PHROG) 1. interj. Term of disgust (we seem to have a
   lot of them).  2. Used as a name for just about anything.  See FOO.
   3. n. Of things, a crock.  Of people, somewhere inbetween a turkey
   and a toad.  4. FROGGY: adj. Similar to BAGBITING (q.v.), but
   milder.  "This froggy program is taking forever to run!"

FROTZ 1. n. See FROBNITZ.  2. MUMBLE FROTZ: An interjection of very
   mild disgust.

FTP (spelled out, NOT pronounced "fittip") 1. n. The File Transfer
   Protocol for transmitting files between systems on the ARPAnet.  2.
   v. To transfer a file using the File Transfer Program.  "Lemme get
   this copy of Wuthering Heights FTP'd from SAIL."

FUDGE 1. v. To perform in an incomplete but marginally acceptable way,
   particularly with respect to the writing of a program.  "I didn't
   feel like going through that pain and suffering, so I fudged it."
   2. n. The resulting code.

FUDGE FACTOR n. A value or parameter that is varied in an ad hoc way
   to produce the desired result.  The terms "tolerance" and "slop"
   are also used, though these usually indicate a one-sided leeway,
   such as a buffer which is made larger than necessary because one
   isn't sure exactly how large it needs to be, and it is better to
   waste a little space than to lose completely for not having enough.
   A fudge factor, on the other hand, can often be tweaked in more
   than one direction.  An example might be the coefficients of an
   equation, where the coefficients are varied in an attempt to make
   the equation fit certain criteria.


GARPLY n. (SAIL) Another meta-word popular among SAIL hackers.

GC [from LISP terminology] 1. v. To clean up and throw away useless
   things. "I think I'll GC the top of my desk today."  2. v. To
   recycle, reclaim, or put to another use.  3. n. An instantiation of
   the GC process.

GLASS TTY n. A terminal which has a display screen but which, because
   of hardware or software limitations, behaves like a teletype or
   other printing terminal.  An example is the ADM-3 (without cursor
   control).  A glass tty can't do neat display hacks, and you can't
   save the output either. Good examples are the Infoton terminals often
   present at RJE sites.

GLITCH [from the Yiddish "glitshen", to slide] 1. n. A sudden
   interruption in electric service, sanity, or program function.
   Sometimes recoverable.  2. v. To commit a glitch.  See GRITCH.

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. v. Similar to GLITCH (q.v.), but
   usually used reflexively.  "My program just glorked itself."

GOBBLE v. To consume or to obtain.  GOBBLE UP tends to imply
   "consume", while GOBBLE DOWN tends to imply "obtain".  "The output
   spy gobbles characters out of a TTY output buffer."  "I guess I'll
   gobble down a copy of the documentation tomorrow."  See SNARF.

GRIND v. 1. (primarily MIT) To format code, especially LISP code, by
   indenting lines so that it looks pretty.  Hence, PRETTY PRINT, the
   generic term for such operations.  2. To run seemingly
   interminably, performing some tedious and inherently useless task.
   Similar to CRUNCH.

GRITCH 1. n. A complaint (often caused by a GLITCH (q.v.)).  2. v. To
   complain.  Often verb-doubled: "Gritch gritch".  3. Glitch.

GROK [from the novel "Stranger in a Strange Land", by Robert Heinlein,
   where it is a Martian word meaning roughly "to be one with"] v. To
   understand, usually in a global sense.

GRONK [popularized by the cartoon strip "B.C." by Johnny Hart, but the
   word apparently predates that] v. 1. To clear the state of a wedged
   device and restart it.  More severe than "to frob" (q.v.).  2. To
   break.  "The teletype scanner was gronked, so we took the system
   down."  3. GRONK OUT: v. To cease functioning.  Of people, to go
   home and go to sleep.  "I guess I'll gronk out now; see you all

GROVEL v. To work interminably and without apparent progress.  Often
   used with "over".  "The compiler grovelled over my code."  Compare
   GRIND and CRUNCH.  Emphatic form: GROVEL OBSCENELY.

GRUNGY adj. Incredibly dirty or grubby.  Anything which has been
   washed within the last year is not really grungy.  Also used
   metaphorically; hence some programs (especially crocks) can be
   described as grungy.

HACK n. 1. Originally a quick job that produces what is needed, but
   not well.  2. The result of that job.  3. NEAT HACK: a clever
   technique.  Also, a brilliant practical joke, where neatness is
   correlated with cleverness, harmlessness, and surprise value.
   Example: the Caltech Rose Bowl card display switch circa 1961.
   4. REAL HACK: a crock (occasionally affectionate).
   v. 5. With "together", to throw something together so it will work.
   6. To bear emotionally or physically.  "I can't hack this heat!" 7.
   To work on something (typically a program).  In specific sense:

   "What are you doing?"  "I'm hacking TECO."  In general sense: "What
   do you do around here?"  "I hack TECO."  (The former is
   time-immediate, the latter time-extended.)  More generally, "I hack
   x" is roughly equivalent to "x is my bag".  "I hack solid-state
   physics."  8. To pull a prank on.  See definition 3 and HACKER (def
   #3).  9. HACK UP (ON): to hack, but generally implies that the
   result is meanings 1-2.  10. HACK VALUE: term used as the reason or
   motivation for expending effort toward a seemingly useless goal,
   the point being that the accomplished goal is a hack.  For example,
   MacLISP has code to read and print roman numerals, which was
   installed purely for hack value.
   HAPPY HACKING: a farewell.  HOW'S HACKING?: a friendly greeting
   among hackers.  HACK HACK: a somewhat pointless but friendly
   comment, often used as a temporary farewell.

HACKER [originally, someone who makes furniture with an axe] n. 1. A
   person who is good at programming quickly.  Not everything a hacker
   produces is a hack.  2. An expert at a particular program, example:
   "A SAIL hacker".  3. A malicious or inquisitive meddler who tries
   to discover information by poking around.  Hence "keyword hacker",
   "network hacker".

HACKISH adj. Being or involving a hack.  HACKISHNESS n.

HAIR n. The complications which make something hairy.  "Decoding TECO
   commands requires a certain amount of hair."  Often seen in the
   phrase INFINITE HAIR, which connotes extreme complexity.

HAIRY adj. 1. Overly complicated.  "DWIM is incredibly hairy."  2.
   Incomprehensible.  "DWIM is incredibly hairy."  3.  Of people,
   high-powered, authoritative, rare, expert, and/or incomprehensible.
   Hard to explain except in context: "He knows this hairy lawyer who
   says there's nothing to worry about."

HANDWAVE 1. v. To gloss over a complex point; to distract a listener;
   to support a (possibly actually valid) point with blatantly faulty
   logic.  2. n. The act of handwaving.  "Boy, what a handwave!"  The
   use of this word is often accompanied by gestures: both hands up,
   palms forward, swinging the hands in a vertical plane pivoting at
   the elbows and/or shoulders (depending on the magnitude of the
   handwave); alternatively, holding the forearms still while rotating
   the hands at the wrist to make them flutter.  In context, the
   gestures alone can suffice as a remark.

HARDWARILY adv. In a way pertaining to hardware.  "The system is
   hardwarily unreliable."  The adjective "hardwary" is NOT used.  See


HOOK (U of I) [From "code hook," a pun] n. Of microcomputers, a jump
   vector in R/W memory. Hence, a place to hang user-written code in the
   middle of what would otherwise be unalterable code. Typically,
   interrupt vectors point to hooks in RAM which are set to reasonable
   values by an initialization routine but are changeable by application

HUNGUS (hung'-ghis) [perhaps related to current slang "humongous";
   which one came first (if either) is unclear] adj. Large, unwieldy,
   usually unmanageable.  "TCP is a hungus piece of code."  "This is a
   hungus set of modifications."

INFINITE adj. Consisting of a large number of objects; extreme.  Used
   very loosely as in: "This program produces infinite garbage."

IRP (erp) [from the MIDAS pseudo-op which generates a block of code
   repeatedly, substituting in various places the car and/or cdr of
   the list(s) supplied at the IRP] v. To perform a series of tasks
   repeatedly with a minor substitution each time through.  "I guess
   I'll IRP over these homework papers so I can give them some random
   grade for this semester."

JFCL (djif'kl or djafik'l) [based on the PDP-10 instruction that acts
   as a fast no-op] v. To cancel or annul something.  "Why don't you
   jfcl that out?"

JIFFY n. 1. Interval of CPU time, commonly 1/60 second or 1
   millisecond. 2. Indeterminate time from a few seconds to forever.
   "I'll do it in a jiffy" means certainly not now and possibly never.

JOCK n. Programmer who is characterized by large and somewhat brute
   force programs.  The term is particularly well-suited for systems


JRST (jerst) [based on the PDP-10 jump instruction] v. To suddenly
   change subjects.  Usage: rather rare.  "Jack be nimble, Jack be
   quick; Jack jrst over the candle stick."

JSYS (jay'sis) [Jump to SYStem] See UUO.

KLUGE (kloodj) alt. KLUDGE [from the German "kluge", clever] n. 1. A
   Rube Goldberg device in hardware or software.  2. A clever
   programming trick intended to solve a particular nasty case in an
   efficient, if not clear, manner.  Often used to repair bugs.  Often
   verges on being a crock.  3. Something that works for the wrong
   reason.  4. v. To insert a kluge into a program.  "I've kluged this
   routine to get around that weird bug, but there's probably a better
   way."  Also KLUGE UP.  5. KLUGE AROUND: to avoid by inserting a
   kluge.  6. (WPI) A feature which is implemented in a RUDE manner.

LIFE n. A cellular-automata game invented by John Horton Conway, and
   first introduced publicly by Martin Gardner (Scientific American,
   October 1970).

LINE FEED (standard ASCII terminology) 1. v. To feed the paper through
   a terminal by one line (in order to print on the next line).  2. n.
   The "character" which causes the terminal to perform this action.


LOSER n. An unexpectedly bad situation, program, programmer, or
   person.  Especially "real loser".

LOSS n. Something which loses.  WHAT A (MOBY) LOSS!: interjection.

LOSSAGE n. The result of a bug or malfunction.

MACROTAPE n. An industry standard reel of tape, as opposed to a

MAGIC adj. 1. As yet unexplained, or too complicated to explain.
   (Arthur C. Clarke once said that magic was as-yet-not-understood
   science.)  "TTY echoing is controlled by a large number of magic
   bits."  "This routine magically computes the parity of an eight-bit
   byte in three instructions."  2. (SAIL) A feature not generally
   publicized which allows something otherwise impossible, or a
   feature formerly in that category but now unveiled.  Example: The
   keyboard commands which override the screen-hiding features.

MARGINAL adj. 1. Extremely small.  "A marginal increase in core can
   decrease GC time drastically."  2. Of extremely small merit.  "This
   proposed new feature seems rather marginal to me."  3. Of extremely
   small probability of winning.  "The power supply was rather
   marginal anyway; no wonder it crapped out."  4. MARGINALLY: adv.
   Slightly.  "The ravs here are only marginally better than at Small
   Eating Place."

MICROTAPE n. Occasionally used to mean a DECtape, as opposed to a

MISFEATURE n. A feature which eventually screws someone, possibly
   because it is not adequate for a new situation which has evolved.
   It is not the same as a bug because fixing it involves a gross
   philosophical change to the structure of the system involved.
   Often a former feature becomes a misfeature because a tradeoff was
   made whose parameters subsequently changed (possibly only in the
   judgment of the implementors).  "Well, yeah, it's kind of a
   misfeature that file names are limited to six characters, but we're
   stuck with it for now."

MODULO prep. Except for.  From mathematical terminology: one can
   consider saying that 4=22 "except for the 9's" (4=22 mod 9).
   "Well, LISP seems to work okay now, modulo that GC bug."

MOON n. 1. A celestial object whose phase is very important to
   hackers.  See PHASE OF THE MOON.

MUMBLE interj. 1. Said when the correct response is either too
   complicated to enunciate or the speaker has not thought it out.
   Often prefaces a longer answer, or indicates a general reluctance
   to get into a big long discussion.  "Well, mumble."  2. Sometimes
   used as an expression of disagreement.  "I think we should buy it."
   "Mumble!"  Common variant: MUMBLE FROTZ.

MUNCH (often confused with "mung", q.v.) v. To transform information
   in a serial fashion, often requiring large amounts of computation.
   To trace down a data structure.  Related to CRUNCH (q.v.), but
   connotes less pain.

MUNCHING SQUARES n. A display hack dating back to the PDP-1, which
   employs a trivial computation (involving XOR'ing of x-y display
   coordinates - see HAKMEM items 146-148) to produce an impressive
   display of moving, growing, and shrinking squares.  The hack
   usually has a parameter (usually taken from toggle switches) which
   when well-chosen can produce amazing effects.  Some of these,
   discovered recently on the LISP machine, have been christened

MUNG (variant: MUNGE) [recursive acronym for Mung Until No Good] v. 1.
   To make changes to afile, often large-scale, usually irrevocable.
   Occasionally accidental.  See BLT.  2. To destroy, usually
   accidentally, occasionally maliciously.  The system only mungs
   things maliciously.

N adj. 1. Some large and indeterminate number of objects; "There were
   N bugs in that crock!"; also used in its original sense of a
   variable name.  2. An arbitrarily large (and perhaps infinite)
   number.  3. A variable whose value is specified by the current
   context.  "We'd like to order N wonton soups and a family dinner
   for N-1."  4. NTH: adj. The ordinal counterpart of N. "Now for the
   Nth and last time..."  In the specific context "Nth-year grad
   student", N is generally assumed to be at least 4, and is usually 5
   or more.  See also 69.

NIGHT MODE  See PHASE (of people).

NIL [from LISP terminology for "false"] No.  Usage: used in reply to a
   question, particularly one asked using the "-P" convention.  See T.

OBOE (U of I and elsewhere) [Acronym for Off By One Error] n. See

OBSCURE adj. Used in an exaggeration of its normal meaning, to imply a
   total lack of comprehensibility.  "The reason for that last crash is
   obscure."  "FIND's command syntax is obscure."  MODERATELY OBSCURE
   implies that it could be figured out but probably isn't worth the

OPEN n. Abbreviation for "open (or left) parenthesis", used when
   necessary to eliminate oral ambiguity.  To read aloud the LISP form
   (DEFUN FOO (X) (PLUS X 1)) one might say: "Open def-fun foo, open
   eks close, open, plus ekx one, close close."  See CLOSE.

PARSE [from linguistic terminology] v. 1. To determine the syntactic
   structure of a sentence or other utterance (close to the standard
   English meaning).  Example: "That was the one I saw you."  "I can't
   parse that."  2. More generally, to understand or comprehend.
   "It's very simple; you just kretch the glims and then aos the
   zotz."  "I can't parse that."

PATCH 1. n. A temporary addition to a piece of code, usually as a
   quick-and-dirty remedy to an existing bug or misfeature.  A patch
   may or may not work, and may or may not eventually be incorporated
   permanently into the program.  2. v. To insert a patch into a piece
   of code.

PDL (piddle or puddle) [acronym for Push Down List] n. 1. A LIFO queue
   (stack); more loosely, any priority queue; even more loosely, any
   queue.  A person's pdl is the set of things he has to do in the
   future.  One speaks of the next project to be attacked as having
   risen to the top of the pdl.  "I'm afraid I've got real work to do,
   so this'll have to be pushed way down on my pdl."  See PUSH and

PHANTOM n. (SAIL) The SAIL equivalent of a DRAGON (q.v.).  Typical
   phantoms include the accounting program, the news-wire monitor, and
   the lpt and xgp spoolers.

PHASE (of people) 1. n. The phase of one's waking-sleeping schedule with
   respect to the standard 24-hour cycle.  This is a useful concept
   among people who often work at night according to no fixed
   schedule.  It is not uncommon to change one's phase by as much as
   six hours/day on a regular basis.  "What's your phase?" "I've been
   getting in about 8 PM lately, but I'm going to work around to the
   day schedule by Friday."  A person who is roughly 12 hours out of
   phase is sometimes said to be in "night mode".  (The term "day
   mode" is also used, but less frequently.)  2. CHANGE PHASE THE HARD
   WAY: To stay awake for a very long time in order to get into a
   different phase. 3. CHANGE PHASE THE EASY WAY: To stay asleep etc.

PHASE OF THE MOON n. Used humorously as a random parameter on which
   something is said to depend.  Sometimes implies unreliability of
   whatever is dependent.  "This feature depends on having the channel
   open in mumble mode, having the foo switch set, and on the phase of
   the moon."

POM n. Phase of the moon (q.v.).  Usage: usually used in the phrase
   "POM dependent" which means flakey (q.v.).

POP [based on the stack operation that removes the top of a stack, and
   the fact that procedure return addresses are saved on the stack]
   dialect: POPJ (pop-jay), based on the PDP-10 procedure return
   instruction.  v. To return from a digression.

PPN (pip'in) [DEC terminology, short for Project-Programmer Number] n.
   1. A combination `project' (directory name) and programmer name,
   used to identify a specific directory belonging to that user.  For
   instance, "FOO,BAR" would be the FOO directory for user BAR.  Since
   the name is restricted to three letters, the programmer name is
   usually the person's initials, though sometimes it is a nickname or
   other special sequence.  (Standard DEC setup is to have two octal
   numbers instead of characters; hence the original acronym.)  2.
   Often used loosely to refer to the programmer name alone.  "I want
   to send you some mail; what's your ppn?"  Usage: not used at MIT,
   since ITS does not use ppn's.  The equivalent terms would be UNAME
   and SNAME, depending on context, but these are not used except in
   their technical senses. See (CHG,PRJ).

PTY (pity) n. Pseudo TTY, a simulated TTY used to run a job under the
   supervision of another job.
   PTYJOB (pity-job) n. The job being run on the PTY.  Also a common
   general-purpose program for creating and using PTYs.
   This is DEC and SAIL terminology; the MIT equivalent is STY.

PUNT [from the punch line of an old joke: "Drop back 15 yards and
   punt"] v. To give up, typically without any intention of retrying.

PUSH [based on the stack operation that puts the current information
   on a stack, and the fact that procedure call addresses are saved on
   the stack] dialect: PUSHJ (push-jay), based on the PDP-10 procedure
   call instruction.  v. To enter upon a digression, to save the
   current discussion for later.

QUES (kwess) 1. n. The question mark character ("?").  2. interj.
   What?  Also QUES QUES?  See WALL.

RANDOM adj. 1. Unpredictable (closest to mathematical definition);
   weird.  "The system's been behaving pretty randomly."  2. Assorted;
   undistinguished.  "Who was at the conference?"  "Just a bunch of
   random business types."  3.  Frivolous; unproductive; undirected
   (pejorative).  "He's just a random loser."  4. Incoherent or
   inelegant; not well organized.  "The program has a random set of
   misfeatures."  "That's a random name for that function."  "Well,
   all the names were chosen pretty randomly."  5. Gratuitously wrong,
   i.e., poorly done and for no good apparent reason.  For example, a
   program that handles file name defaulting in a particularly useless
   way, or a routine that could easily have been coded using only
   three ac's, but randomly uses seven for assorted non-overlapping
   purposes, so that no one else can invoke it without first saving
   four extra ac's. 6. In no particular order, though deterministic.
   "The I/O channels are in a pool, and when a file is opened one is
   chosen randomly."  n. 7. A random hacker; used particularly of high
   school students who soak up computer time and generally get in the
   way.  8. (Occasional MIT usage) One who lives at Random Hall.
   J. RANDOM is often prefixed to a noun to make a "name" out of it
   (by comparison to common names such as "J. Fred Muggs").  The most
   common uses are "J. Random Loser" and "J. Random Nurd" ("Should
   J. Random Loser be allowed to gun down other people?"), but it
   can be used just as an elaborate version of RANDOM in any sense.

RANDOMNESS n. An unexplainable misfeature; gratuitous inelegance.
   Also, a hack or crock which depends on a complex combination
   of coincidences (or rather, the combination upon which the
   crock depends).  "This hack can output characters 40-57 by
   putting the character in the accumulator field of an XCT and
   then extracting 6 bits -- the low two bits of the XCT opcode
   are the right thing."  "What randomness!"

RAVE (WPI) v. 1. To persist in discussing a specific subject.  2. To
   speak authoritatively on a subject about which one knows very
   little.  3. To complain to a person who is not in a position to
   correct the difficulty.  4. To purposely annoy another person
   verbally.  5. To evangelize.

REAL WORLD, THE n. 1. In programming, those institutions at which
   programming may be used in the same sentence as FORTRAN, COBOL,
   RPG, IBM, etc.  2. To programmers, the location of non-programmers
   and activities not related to programming.  3. A universe in which
   the standard dress is shirt and tie and in which a person's working
   hours are defined as 9 to 5.  4. The location of the status quo.
   "Poor fellow, he's left MIT and gone into the real world."  Used
   pejoratively by those not in residence there.  In conversation,
   talking of someone who has entered the real world is not unlike
   talking about a deceased person.


RIGHT THING, THE n. That which is "obviously" the correct or
   appropriate thing to use, do, say, etc.  Use of this term often
   implies that in fact reasonable people may disagree.  "Never let
   your conscience keep you from doing the right thing!"  "What's the
   right thing for LISP to do when it reads '(.)'?"

RUDE (WPI) adj. 1. (Of a program) Badly written.  2. Functionally
   poor, e.g. a program which is very difficult to use because of
   gratuitously poor (random?) design decisions.  See CUSPY.

SACRED adj. Reserved for the exclusive use of something (a
   metaphorical extension of the standard meaning).  "Accumulator 7 is
   sacred to the UUO handler."  Often means that anyone may look at
   the sacred object, but clobbering it will screw whatever it is
   sacred to.

SAV (save)  See BIN.

SEMI 1. n. Abbreviation for "semicolon", when speaking.  "Commands to
   GRIND are prefixed by semi-semi-star" means that the prefix is
   ";;*", not 1/4 of a star.  2. Prefix with words such as
   "immediately", as a qualifier.  "When is the system coming up?"

SERVER n. A kind of DAEMON which performs a service for the requester,
   which often runs on a computer other than the one on which the
   server runs.

SHR (share)  See BIN.

SLOP n. 1. A one-sided fudge factor (q.v.).  Often introduced to avoid
   the possibility of a fencepost error (q.v.).  2. (Used by compiler
   freaks) The ratio of code generated by a compiler to hand-compiled
   code, minus 1; i.e. the space (or maybe time) you lose because you
   didn't do it yourself.

SLURP v. To read a large data file entirely into core before working
   on it.  "This program slurps in a 1K-by-1K matrix and does an FFT."

SNARF v. To grab, esp. a large document or file for the purpose of
   using it either with or without the author's permission.  See BLT.
   Variant: SNARF (IT) DOWN.  (At MIT on ITS, DDT has a command called
   :SNARF which grabs a job from another (inferior) DDT.)

SOFTWARE ROT n. Hypothetical disease the existence of which has been
   deduced from the observation that unused programs or features will
   stop working after sufficient time has passed, even if "nothing has
   changed".  Also known as "bit decay".

SOFTWARILY adv. In a way pertaining to software.  "The system is
   softwarily unreliable."  The adjective "softwary" is NOT used.  See

SPAZZ 1. v. To behave spastically or erratically; more often, to
   commit a single gross error.  "Boy, is he spazzing!"  2. n. One who
   spazzes.  "Boy, what a spazz!"  3. n. The result of spazzing.
   "Boy, what a spazz!"

SPLAT n. 1. Name used in many places (DEC, IBM, and others) for the
   ASCII star ("*") character.  2. (MIT) Name used by some people for
   the ASCII pound-sign ("#") character.  3. (SAIL) Name used by some
   people for the Stanford/ITS extended ASCII circle-x character.

SUPDUP v. To communicate with another ARPAnet host using the SUPDUP
   program, which is a SUPer-DUPer TELNET talking a special display
   protocol used mostly in talking to ITS sites.  Sometimes abbreviated
   to SD.

STATE n. Condition, situation.  "What's the state of NEWIO?"  "It's
   winning away."  "What's your state?"  "I'm about to gronk out."  As
   a special case, "What's the state of the world?" (or, more silly,
   "State-of-world-P?") means "What's new?" or "What's going on?"

STOPPAGE n. Extreme lossage (see LOSSAGE) resulting in something
   (usually vital) becoming completely unusable.

STY (pronounced "sty", not spelled out) n. A pseudo-teletype, which is
   a two-way pipeline with a job on one end and a fake keyboard-tty
   on the other.  Also, a standard program which provides a pipeline
   from its controlling tty to a pseudo-teletype (and thence to another
   tty, thereby providing a "sub-tty").

   This is MIT terminology; the SAIL and DEC equivalent is PTY.

SUPERPROGRAMMER n. See "wizard", "hacker".  Usage: rare.  (Becoming
   more common among IBM and Yourdon types.)

SWAPPED v. From the use of secondary storage devices to implement
   virtual memory in computer systems.  Something which is SWAPPED IN
   is available for immediate use in main memory, and otherwise is
   SWAPPED OUT.  Often used metaphorically to refer to people's
   memories: "I read TECO ORDER every few months to keep the
   information swapped in."

SYSTEM n. 1. The supervisor program on the computer.  2. Any
   large-scale program.  3. Any method or algorithm.  4. The way
   things are usually done.  Usage: a fairly ambiguous word.  "You
   can't beat the system."
   SYSTEM HACKER: one who hacks the system (in sense 1 only; for sense
   2 one mentions the particular program: e.g., LISP HACKER)

T [from LISP terminology for "true"] Yes.  Usage: used in reply to a
   question, particularly one asked using the "-P" convention).  See


TASTE n. (Primarily MIT-DMS) The quality in programs which tends to be
   inversely proportional to the number of features, hacks, and
   kluges programmed into it.  Also, TASTEFUL, TASTEFULNESS.  Although
   TASTEFUL and FLAVORFUL are essentially synonyms, TASTE and FLAVOR
   are not.

THEORY n. Used in the general sense of idea, plan, story, or set of
   rules.  "What's the theory on fixing this TECO loss?"  "What's the
   theory on dinner tonight?"  ("Chinatown, I guess.")  "What's the
   current theory on letting losers on during the day?"  "The theory
   behind this change is to fix the following well-known screw..."

THRASH v. To move wildly or violently.  Swapping systems which are
   overloaded spend much of their time moving pages into and out of
   core, and are therefore said to thrash.

TICK n. Interval of time; basic clock time on the computer.  Typically
   1/60 second.  See JIFFY.

TRAP 1. n. A program interrupt, usually used specifically to refer to
   an interrupt caused by some illegal action taking place in the user
   program.  In most cases the system monitor performs some action
   related to the nature of the illegality, then returns control to
   the program.  See UUO.  2. v. To cause a trap.  "These instructions
   trap to the monitor."  Also used transitively to indicate the cause
   of the trap.  "The monitor traps all input/output instructions."

TTY (spelled out) n. Terminal of the teletype variety, characterized by a
   noisy mechanical printer, a very limited character set, and poor
   print quality.  Usage: antiquated (like the TTY's themselves).
   Sometimes used to refer to any terminal at all; sometimes used
   to refer to the particular terminal controlling a job.

TWEAK v. To change slightly, usually in reference to a value.  Also
   used synonymously with TWIDDLE.  See FROBNICATE and FUDGE FACTOR.

TWIDDLE n. 1. tilde (ASCII 176, " +").  Also called "squiggle",
   "sqiggle" (sic--pronounced "skig'gul"), and "twaddle", but twiddle
   is by far the most common term.  2. A small and insignificant
   change to a program.  Usually fixes one bug and generates several
   new ones.  3. v. To change something in a small way.  Bits, for
   example, are often twiddled.  Twiddling a switch or knob implies
   much less sense of purpose than toggling or tweaking it; see

UP adj. 1. Working, in order.  "The down escalator is up."  2. BRING
   UP: v. To create a working version and start it.  "They brought up
   a down system."

USER n. A programmer who will believe anything you tell him.  One who
   asks questions.  Basically, there are two classes of people who work
   with a program: there are implementors (hackers) and users (losers).
   The users are looked down on by hackers to a mild degree because
   they don't understand the full ramifications of the system in all
   its glory.  (A few users who do are known as real winners.)  It
   is true that users ask questions (of necessity).  Very often they
   are annoying or downright stupid.

UUO (you-you-oh) [short for "Un-Used Operation"] n. A DEC-10 system
   monitor call.  The term "Un-Used Operation" comes from the fact
   that, on DEC-10 systems, monitor calls are implemented as invalid
   or illegal machine instructions, which cause traps to the monitor
   (see TRAP).  The SAIL manual describing the available UUO's has a
   cover picture showing an unidentified underwater object.  See YOYO.
   [Note: DEC sales people have since decided that "Un-Used Operation"
   sounds bad, so UUO now stands for "Unimplemented User Operation".]
   Tenex and Twenex systems use the JSYS machine instruction (q.v.),
   which is halfway between a legal machine instruction and a UUO,
   since KA-10 Tenices implement it as a hardware instruction which
   can be used as an ordinary subroutine call (sort of a "pure JSR").

VANILLA adj. Ordinary flavor, standard.  See FLAVOR.  When used of
   food, very often does not mean that the food is flavored with
   vanilla extract!  For example, "vanilla-flavored wonton soup" means
   ordinary wonton soup, as opposed to hot and sour wonton soup.

VIRGIN adj. 1. Unused, in reference to an instantiation of a program.
   "Let's bring up a virgin system and see if it crashes again."
   Also, by extension, unused buffers and the like within a program.
   2. As supplied by the vendor. "Virgin PFM fits in PP memory with the
   new additions, but with our mods there's an overflow.

VISIONARY n. One who hacks vision (in an AI context, such as the
   processing of visual images).

WALDO [probably taken from the story "Waldo", by Heinlein, which is
   where the term was first used to mean a mechanical adjunct to a
   human limb] Used at Harvard, particularly by Tom Cheatham and
   students, instead of FOOBAR as a meta-syntactic variable and
   general nonsense word.  See FOO, BAR, FOOBAR, QUUX.

WALL [shortened form of HELLO WALL, apparently from the phrase "up
   against a blank wall"] (WPI) interj. 1. An indication of confusion,
   usually spoken with a quizzical tone.  "Wall??"  2. A request for
   further explication.

WEDGED [from "head wedged up ass"] adj. To be in a locked state,
   incapable of proceeding without help.  (See GRONK.)  Often refers
   to humans suffereing misconceptions.  "The swapper is wedged."
   This term is sometimes used as a synonym for DEADLOCKED (q.v.).

WIN [from MIT jargon] 1. v. To succeed.  A program wins if no
   unexpected conditions arise.  2. BIG WIN: n. Serendipity.
   Emphatic forms: MOBY WIN, SUPER WIN, HYPER-WIN (often used
   interjectively as a reply).  For some reason SUITABLE WIN is also
   common at MIT, usually in reference to a satisfactory solution to a
   problem.  See LOSE.

WINNER 1. n. An unexpectedly good situation, program, programmer or
   person.  2. REAL WINNER: often sarcastic, but also used as high

WIZARD n. 1. A person who knows how a complex piece of software or
   hardware works; someone who can find and fix his bugs in an
   emergency.  Rarely used at MIT, where HACKER is the preferred term.
   2. A person who is permitted to do things forbidden to ordinary
   people, e.g., a "net wizard" on a TENEX may run programs which
   speak low-level host-imp protocol; an ADVENT wizard at SAIL may
   play Adventure during the day.

WORMHOLE n. A location in a monitor which contains the address of a
   routine, with the specific intent of making it easy to substitute a
   different routine.  The following quote comes from "Polymorphic
   Systems", vol. 2, p. 54:

   "Any type of I/O device can be substituted for the standard device
   by loading a simple driver routine for that device and installing
   its address in one of the monitor's `wormholes.' See HOOK.

XJ (U of I) [From the Cyber 170 instruction set mnemonic Exchange Jump]
   v. To drop the current activity and begin an unrelated task. "Let's
   blow this off and XJ to the astro lab."

YOYO n. DEC service engineers' slang for UUO (q.v.).  Usage: rare at
   SAIL and MIT, has been found at random DEC installations.

YOYO MODE n. State in which the system is said to be when it rapidly
   alternates several times between being up and being down.