Search Keyword By: W



Wideband Code Division Multiple Access

W-profile fiber

Synonym doubly clad fiber.


A thin slice of semiconducting material, such as a silicon crystal, upon which microcircuits are constructed by diffusion and deposition of various materials. Note: Millions of individual circuit elements, constituting hundreds of microcircuits, may be constructed on a single wafer. The individual microcircuits are separated by scoring and breaking the wafer into individual chips (“dice”).


Acronym for Wide Area Information Servers. A distributed text searching system that uses the protocol standard ANS Z39.50 to search index databases on remote computers. Note 1: WAIS libraries are most often found on the Internet. Note 2: WAIS allows users to discover and access information resources on the network without regard to their physical location. Note 3: WAIS software uses the client-server model.


A graphic image that serves as a background for a Web page or for a computer operating system’s screen.


Acronym for wide area network.


Relative to jitter and swim, long-term random variations of the significant instants of a digital signal from their ideal positions. Note 1: Wander variations are those that occur over a period greater than 1 s (second). Note 2: Jitter, swim, wander, and drift have increasing periods of variation in that order.


Wireless Application Protocol

warm boot

Synonym warm restart.

warm restart

A sequence of operations that is performed to reset a previously running system, after an unintentional shutdown. Synonym warm start. 2. In computer operations, the restarting of equipment, after a sudden shutdown, that allows reuse of previously retained initialized input data, retained programs, and retained output queues. Note 1: A warm restart may be needed after a program failure. Note 2: A warm start or restart cannot occur if initial data, programs, and files are not retained after closedown. Synonyms hot boot, warm boot. [From Weik ’89]

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