The Hacker's Dictionary, - [best reads of all time .txt] 📗

gradually and continuously by maintaining a steady wake-sleep cycle somewhat longer than 24 hours, e.g., living six long (28-hour) days in a week (or, equivalently, sleeping at the rate of 10 microhertz). See also {phase-wrapping}.

:write-only code: [a play on `read-only memory'] n. Code so arcane, complex, or ill-structured that it cannot be modified or even comprehended by anyone but its author, and possibly not even by him/her. A {Bad Thing}.

:write-only language: n. A language with syntax (or semantics) sufficiently dense and bizarre that any routine of significant size is {write-only code}. A sobriquet applied occasionally to C and often to APL, though {INTERCAL} and {TECO} certainly deserve it more.

:write-only memory: n. The obvious antonym to read-only memory'. Out of frustration with the long and seemingly useless chain of approvals required of component specifications, during which no actual checking seemed to occur, an engineer at Signetics once created a specification for a write-only memory and included it with a bunch of other specifications to be approved. This inclusion came to the attention of Signetics {management} only when regular customers started calling and asking for pricing information. Signetics published a corrected edition of the data book and requested the return of theerroneous' ones. Later, around 1974, Signetics bought a double-page spread in `Electronics'

magazine's April issue and used the spec as an April Fools' Day joke. Instead of the more conventional characteristic curves, the 25120 "fully encoded, 9046 x N, Random Access, write-only-memory"

data sheet included diagrams of "bit capacity vs. Temp.", "Iff vs. Vff", "Number of pins remaining vs. number of socket insertions", and "AQL vs. selling price". The 25120 required a 6.3 VAC VFF supply, a +10V VCC, and VDD of 0V, +/- 2%.

:Wrong Thing: n. A design, action, or decision that is clearly incorrect or inappropriate. Often capitalized; always emphasized in speech as if capitalized. The opposite of the {Right Thing}; more generally, anything that is not the Right Thing. In cases where `the good is the enemy of the best', the merely good ---

although good --- is nevertheless the Wrong Thing. "In C, the default is for module-level declarations to be visible everywhere, rather than just within the module. This is clearly the Wrong Thing."

:wugga wugga: /wuh'g wuh'g/ n. Imaginary sound that a computer program makes as it labors with a tedious or difficult task.

Compare {cruncha cruncha cruncha}, {grind} (sense 4).

:WYSIAYG: /wiz'ee-ayg/ adj. Describes a user interface under which "What You See Is All You Get"; an unhappy variant of {WYSIWYG}. Visual, `point-and-shoot'-style interfaces tend to have easy initial learning curves, but also to lack depth; they often frustrate advanced users who would be better served by a command-style interface. When this happens, the frustrated user has a WYSIAYG problem. This term is most often used of editors, word processors, and document formatting programs. WYSIWYG

`desktop publishing' programs, for example, are a clear win for creating small documents with lots of fonts and graphics in them, especially things like newsletters and presentation slides. When typesetting book-length manuscripts, on the other hand, scale changes the nature of the task; one quickly runs into WYSIAYG

limitations, and the increased power and flexibility of a command-driven formatter like TeX or UNIX's `troff(1)' becomes not just desirable but a necessity.

:WYSIWYG: /wiz'ee-wig/ adj. Describes a user interface under which "What You See Is What You Get", as opposed to one that uses more-or-less obscure commands which do not result in immediate visual feedback. True WYSIWYG in environments supporting multiple fonts or graphics is a a rarely-attained ideal; there are variants of this term to express real-world manifestations including WYSIAWYG (What You See Is Almost What You Get) and WYSIMOLWYG (What You See Is More or Less What You Get). All these can be mildly derogatory, as they are often used to refer to dumbed-down {user-friendly} interfaces targeted at non-programmers; a hacker has no fear of obscure commands (compare {WYSIAYG}). On the other hand, {EMACS} was one of the very first WYSIWYG editors, replacing (actually, at first overlaying) the extremely obscure, command-based {TECO}. See also {WIMP

environment}. [Oddly enough, WYSIWYG has already made it into the OED, in lower case yet. --- ESR]

= X =

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:X: /X/ n. 1. Used in various speech and writing contexts (also in lowercase) in roughly its algebraic sense of `unknown within a set defined by context' (compare {N}). Thus, the abbreviation 680x0 stands for 68000, 68010, 68020, 68030, or 68040, and 80x86

stands for 80186, 80286 80386 or 80486 (note that a UNIX hacker might write these as 680[0-4]0 and 80[1-4]86 or 680?0 and 80?86

respectively; see {glob}). 2. [after the name of an earlier window system called `W'] An over-sized, over-featured, over-engineered and incredibly over-complicated window system developed at MIT and widely used on UNIX systems.

:XEROX PARC: The famed Palo Alto Research Center. For more than a decade, from the early 1970s into the mid-1980s, PARC yielded an astonishing volume of groundbreaking hardware and software innovations. The modern mice, windows, and icons style of software interface was invented there. So was the laser printer, and the local-area network; and PARC's series of D machines anticipated the poweful personal computers of the 1980s by a decade. Sadly, these prophets were without honor in their own company; so much so that it became a standard joke to describe PARC as a place characterized by developing brilliant ideas for everyone else.

:XOFF: /X'of/ n. Syn. {control-S}.

:XON: /X'on/ n. Syn. {control-Q}.

:xor: /X'or/, /kzor/ conj. Exclusive or. A xor B' meansA or B, but not both'. "I want to get cherry pie xor a banana split." This derives from the technical use of the term as a function on truth-values that is true if exactly one of its two arguments is true.

:xref: /X'ref/ vt., n. Hackish standard abbreviation for `cross-reference'.

:XXX: /X-X-X/ n. A marker that attention is needed.

Commonly used in program comments to indicate areas that are kluged up or need to be. Some hackers liken `XXX' to the notional heavy-porn movie rating.

:xyzzy: /X-Y-Z-Z-Y/, /X-Y-ziz'ee/, /ziz'ee/, or /ik-ziz'ee/

[from the ADVENT game] adj. The {canonical} `magic word'.

This comes from {ADVENT}, in which the idea is to explore an underground cave with many rooms and to collect the treasures you find there. If you type `xyzzy' at the appropriate time, you can move instantly between two otherwise distant points. If, therefore, you encounter some bit of {magic}, you might remark on this quite succinctly by saying simply "Xyzzy!" "Ordinarily you can't look at someone else's screen if he has protected it, but if you type quadruple-bucky-clear the system will let you do it anyway." "Xyzzy!" Xyzzy has actually been implemented as an undocumented no-op command on several OSes; in Data General's AOS/VS, for example, it would typically respond "Nothing happens", just as {ADVENT} did if the magic was invoked at the wrong spot or before a player had performed the action that enabled the word. In more recent 32-bit versions, by the way, AOS/VS

responds "Twice as much happens". See also {plugh}.

= Y =

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:YA-: [Yet Another] abbrev. In hackish acronyms this almost invariably expands to {Yet Another}, following the precedent set by UNIX `yacc(1)' (Yet Another Compiler-Compiler). See {YABA}.

:YABA: /ya'b*/ [Cambridge] n. Yet Another Bloody Acronym.

Whenever some program is being named, someone invariably suggests that it be given a name that is acronymic. The response from those with a trace of originality is to remark ironically that the proposed name would then be `YABA-compatible'. Also used in response to questions like "What is WYSIWYG?" See also {TLA}.

:YAUN: /yawn/ [Acronym for `Yet Another UNIX Nerd'] n. Reported from the San Diego Computer Society (predominantly a microcomputer users' group) as a good-natured punning insult aimed at UNIX

zealots.

:Yellow Book: [proposed] n. The print version of this Jargon File; `The New Hacker's Dictionary', MIT Press, 1991 (ISBN

0-262-68069-6). Includes all the material in the 2.9.6 version of the File, plus a Foreword by Guy L. Steele Jr. and a Preface by Eric S. Raymond. Most importantly, the book version is nicely typeset and includes almost all of the infamous Crunchly cartoons by the Great Quux, each attached to an appropriate entry.

:yellow wire: [IBM] n. Repair wires used when connectors (especially ribbon connectors) got broken due to some schlemiel pinching them, or to reconnect cut traces after the FE mistakenly cut one. Compare {blue wire}, {purple wire}, {red wire}.

:Yet Another: adj. [From UNIX's yacc(1)',Yet Another Compiler-Compiler', a LALR parser generator] 1. Of your own work: A humorous allusion often used in titles to acknowledge that the topic is not original, though the content is. As in Yet Another AI Group' orYet Another Simulated Annealing Algorithm'. 2. Of others' work: Describes something of which there are already far too many. See also {YA-}, {YABA}, {YAUN}.

:You are not expected to understand this: cav. [UNIX] The canonical comment describing something {magic} or too complicated to bother explaining properly. From an infamous comment in the context-switching code of the V6 UNIX kernel.

:You know you've been hacking too long when...: The set-up line for a genre of one-liners told by hackers about themselves. These include the following:

not only do you check your email more often than your paper