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- = X =
- =====
-
- 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.
-
- XOFF: /X'of/ n. Syn. {control-s}.
-
- xor: /X'or/, /kzor/ conj. Exclusive or. `A xor B' means
- `A 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. See also {plugh}.
-