W
* Wafer
* Walking 1s Test
* Watchdog Device
* WDT: WatchDog Timer
* Web Switch
* Wireless Modem
* Workstation
* WQXGA: Wide Quad eXtended Graphics Array
* WRAM: Windows RAM
* Wrap Plug
* Write-Back Cache
* Write-Through Cache
wafer
Wafer is a piece of thin, round semiconductor material (typically silicon) which is used to make microchips. Typically, Silicon crystal is grown into a large cylindrical ingot, then sliced into very thin wafers.
walking 1s test
A memory test that involves moving a 1 bit through a byte or word to systematically confirm each bit can hold a 1 value. All of the other bits are set to 0 during the test.
watchdog device
A watchdog device is used to protect a system from specific software or hardware failures. The target application should be registered with the watchdog device then periodically send messages to the watchdog device. If the watchdog device does not receive the signal message after a while, it would assume the target application or system is down and execute the proper keystrokes to reboot the machine or restart the application.
WDT: WatchDog Timer
The watchdog timer (WDT) is a 16 bit counter that resets the processor when it rolls over to zero. The watchdog timer is a fail-safe mechanism that intervenes if a system stops functioning or in case of a code crash. To avoid getting unnecessary reset, the software program must reset the timer periodically.
Web switch
Web switch routes traffic to the appropriate Web server based on the URL or IP address of the request. Web switch is also known as a "URL switch," "Web content switch," "content switch" and "Layer 7 switch".
wireless modem
Wireless modem convert radios (HF/VHF/UHF) into digital communications devices to access a private wireless data network or a wireless telephone system, such as the CDPD system. You can use the wireless modem to send and receive e-mail, transfer files, monitor remote operations, and use numerous other applications. Wireless modems come in a variety of types, bandwidths, and speeds. Wireless modems are often referred to as transparent or smart.
workstation
Workstation is a type of stand alone computer for powerful applications such as publishing, software development, etc. Workstations typically have a large, high-resolution graphics screen, large RAM, built-in network interface, and a graphical processor in addition to normal CPU. The most common operating systems for workstations are LINUX, UNIX and Windows.
WQXGA: Wide Quad eXtended Graphics Array
Wide Quad eXtended Graphics Array(WQXGA) is a display resolution of roughly 2560×1600 pixels with a 16:10 aspect ratio. The name comes from the fact that it is a wide version of QXGA, which in turn has four times as many pixels as an XGA display. As of 2005, there are very few devices that can render images at such high resolution. The 30" Apple Cinema Display is one such device.
WRAM: Windows RAM
Windows RAM (WRAM) is a type of RAM designed by Samsung with two ports that enables a video adapter to fetch the contents of memory for display at the same time that new bytes are being pumped into memory.
wrap plug
Wrap plug, also kown as loopback plug, can be inserted into a port on a communications device to perform a diagnostic test called a loopback test.
Write-back cache
Write-back caching is a caching method which is used in many microprocessors, including all Intel processors since the 80486. With write-back caching, data modifications to data stored in the L1 cache aren't copied to main memory until absolutely necessary.
write-through cache
Write through cache is a type of cache which allows data to be written to main memory and the L1 memory simultaneously.