CPU = Central Processing Unit RAM = Random Access Memory ROM = Read Only Memory Computer = Commonly Operated Machine Particularly Used in Technical and Educational Research PROM = Programmable Read Only Memory EPROM = Erasable PROM EEPROM = Electrically EPROM HDD = Hard Disk Drive FDD = Floppy Disk Drive KBD = KeyBoard I/O = Input & Output CD = Compact Disk DVD = Digital Video Disk USB = Universal Serial Bus SMPS = Switch Mode Power Supply POST = Power ON Self Test BIOS = Basic Input Output System VDU = Visible Display Unit LED = Light Embedded Diode LCD = Liquid Crystal Display VGA = Video/Visual Graphic Adapter HTTP = Hyper Text Templates WWW = World Wide WebLAN = Local Area Network WAN = Wide Area Network MAN = Metropolitan Area Network HLL = High Level Language LLL = Low Level Language MIPS = Million of Instruction Per Second Mbps = Mega Bytes Per second Kbps = Kilo Bytes per second