Micro computers

The micro computers include personal computers (PCs) and home computer, and are mostly used by individuals at home or in office. It consists of a system unit, the keyboard and Visual Display Unit, the keyboard and visual Display Unit (VDU). Most have 64k (64 kilobytes) to 521 k of internal memory, but in some, memory is measured in megabytes (MB, millions of bytes). Microcomputers usually have processing speeds that are measured in processing speeds that are measured in micro seconds (millionth of a second). The standard typewriter keys – viz A to Z, 0 to 9 and certain special character together constituting the alpha – numeric characters – are an essential part of all the micro computer keyboards which also have two or three additional groups of keys. A set of ten special function keys (f1 to f10) exists as a group and these can be programmed to perform special tasks (in the programming mode). A total of 84 or 101 or 121 keyboard is connected to the system unit of the micro computer via a coiled cable. Recently an ergonomic split keyboard has been developed which is designed to reduce finger fatigue and enhance speed. The VDU is the video display terminal for the microcomputer system. This can be either a monochrome (black and white) or monitor.