UMB
upper memory block
UPS
uninterruptible power supply
USB
universal serial bus
V
volt(s)
VAC
volt(s) alternating current
VDC
volt(s) direct current
VGA
video graphics array
VLSI
VRAM
video
VRM
voltage regulator module
W
watt(s)
WH
XMM
extended memory manager
XMS