Dell PowerEdge 1500SC - Manual (Page 41)

VRAM is dual-ported, allowing the video adapter to update the screen and receive new image data at the same time.
W
Abbreviation for watt(s).
WH
Abbreviation for watt-hour(s).
write-protected
Read-only files are said to be write-protected. You can write-protect a 3.5-inch diskette by sliding its write-protect tab to the open position or by setting the
write-protect feature in the System Setup program.
XMM
Abbreviation for extended memory manager, a utility that allows application programs and operating systems to use extended memory in accordance with the
XMS.
XMS
Abbreviation for eXtended Memory Specification.
ZIF
Acronym for zero insertion force. Some systems use ZIF sockets and connectors to allow devices such as the microprocessor chip to be installed or removed
with no stress applied to the device.
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