The following are the most common computer abbreviations. I just compiled it from different sources and books. I know there are more of such acronyms, however these are used often in computer related fields. Even some of them may be named interchangeably, for example, DVD (digital video disc or digital versatile disc).
AC - Alternating Current
AGP - Accelerated Graphics Port
BIOS - Basic Input Output System
Bit - Binary digits
Bps - Bytes per second
CD-R - Compact Disk - Recordable
CD-ROM - Compact Disk – Read Only Memory
CD-RW - Compact Disk – Rewritable
CMOS - Complementary Metal-Oxide Semiconductor
CPU - Central Processing Unit
CRT - Cathode Ray Tube
DC - Direct Current
DDRAM - Double Data Random Access Memory
DIMM - Dual Inline Memory Module
DVD - Digital Versatile Disk
EDO - Extended Data Out
EPROM - Erasable Programmable Read Only Memory
FDD - Floppy Disk Drive
GHZ - Gigahertz
HDD - Hard Disk Drive
I/O - Input/Output
IDE - Integrated Drive Electronics
LCD - Liquid Crystal Display
MB - Megabits
PCI - Peripheral Component Interconnect
PROM - Programmable Read Only Memory
RAM - Random Access Memory
ROM - Read Only Memory
SCSI - Small Computer System Interface
SDRAM - Synchronous Dynamic Random Access Memory
SVGA - Super Video Graphics Adapter
USB - Universal Serial Bus
VGA - Video Graphics Array