X
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 {Intel 80186}, {Intel 80286},
{Intel 80386} or {Intel 80486}. 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. An alternative name for the {X Window System}.
3. A suffix for the speed of a {CD-ROM} drive
relative to standard music CDs (1x). 32x is common in
September 1999.
[{Jargon File}]
(1999-09-15)