| Term | Description |
|---|
| X Windowing System | A GUIdeveloped to work with different operating systems, and to support networking.That is, one machine may be running an application,and the userinterface to the application can be running on another machine. |
| X-Face | X-Faces are small monochrome images embedded in headers for both provides a e-mail and news messages. Better mail and news applications will display them (sometimes automatically, sometimes only per request). |
| X-Windows | X-Windows provides a GUI for most UNIX systems, but can also be found as an add-on library for other computers. Numerous window managers run on top of it. It is often just called "X". |
| X2B | Hexadecimal to Binary [REXX]
|
| X2C | Hexadecimal to Character [REXX]
|
| X2D | Hexadecimal to Decimal [REXX]
|
| x86 | The x86 series of processors includes the Pentium, Pentium Pro, Pentium II, Pentium III, Celeron, and Athlon as well as the 786, 686, 586, 486, 386, 286, 8086, 8088, etc. It is an exceptionally popular design (by far the most popular CISC series) in spite of the fact that even its fastest model is significantly slower than the assorted RISC processors. Many different OSes run on machines built around x86 processors, including MS-DOS, Windows 3.1, Windows '95, Windows '98, Windows ME, Windows NT, Windows 2000, Windows CE, GEOS, Linux, Solaris, OpenBSD, NetBSD, FreeBSD, Mac OS X, OS/2, BeOS, CP/M, etc. A couple different companies produce x86 processors, but the bulk of them are produced by Intel. It is expected that this processor will eventually be completely replaced by the Merced, but the Merced development schedule is somewhat behind. Also, it should be noted that the Pentium III processor has stirred some controversy by including a "fingerprint" that will enable individual computer usage of web pages etc. to be accurately tracked. |
| XA | Extended Architecture + Extended Attribute
|
| XACML | Extensible Access Control Markup Language
|
| XAPIA | X.400 Application Program Interface Association
|
| XCHG | Exchange
|
| XCMD | External Command
|
| XCOPY | Extended Copy
|
| XDF | Extended Density Format [IBM]
|
| XDR | Extended/External Data Representation
|
| XFCN | External Function
|
| XFDL | Extensible forms Description Language
|
| XGA | Extended Graphics Array [IBM]
|
| XHTML | Extensible HyperText Markup Language
|
| XID | Exchange Identifier
|
| XIOS | Extended Input/Output System
|
| XLAT | Translate
|
| XLF | Exceptional Fortran [IBM]
|
| XLL | Extensible Link Language
|
| XLM | Excel Macro Language [Microsoft]
|
| XMIT | Transmit
|
| XML | Extensible Markup Language
|
| XMM | Extended Memory Manager [LIM/AST]
|
| XMS | Extended Memory Specification [LIM/AST]
|
| XMSMemory | See Extendedmemory. |
| XNS | Xerox Network System (protocol) [Xerox]
|
| XOFF | Transmitter Off
|
| XON | Transmitter On
|
| XOR | Exclusive OR (Also EOR)
|
| XP | Extreme Performance [Compaq]
|
| XPCOM | Cross Platform Component Object Model [Mozilla]
|
| XPE | XP Embedded (see WIN...XP) [Microsoft]
|
| XPRM | Xerox Print Resources Manager [Xerox]
|
| XRNS | Extensible Resource Name System
|
| XRT | Extensions for Real-Time
|
| XSL | Extensible Style Language
|
| XSLT | Extensible Stylesheet Transformation
|
| XSMD | Extended Storage Module Drive (interface)
|
| XSSI | Extended Server Side Includes
|
| XT | The second generation of IBMPCs, distinguished by a hard disk and an eight-bit bus. Any IBM-compatiblecomputer based on the Intel 8088CPU. |
| XTAL | Crystal
|
| XTCLK | External Transmit Clock
|
| XUL | Extensible User-Interface Language [Netscape]
|
