Types of Computer

1: Super Computer:
These are largest in size, fast in speed & have a capacity to perform many people tasks. More then 1000 people can work at a time on a single super computer. Speed of this computer is measured in BIPS (Billion Instruction Per Second). An instruction means a statement to perform a task. So, in on second these computers can execute one billion instructions. These computers are being used in Aerospace Technology & Atomic Energy.
2: Mainframe Computer:
These are second category computers. These are smaller than super controller but these are also large computer, fast in speed but slow as compared to Super Computer. On such type of computer 100 to 1000 people can work at a time. Speed of these computers is measured in MIPS (Million Instruction Per Second) means one million instructions can be processed in one second. These computers are being used in large organizations as by Air force, Navy, Pakistan Steel Mills, Large Bank & Agha Khan University is also using such computers.
3: Mini Computer:
These are 3rd category computers. These are small in size with low speed as compared to super & mainframe computer. On such types of computer upto 500 people can work at a time. Speed of these computer is measured in KIPS (Kilo Instruction Per Second) means 1000 instructions can be processed in a second. These computers are being used in middle size companies & organizations like hotels, railways, PIA & super stores etc.
4: Micro or Personal Computer:
These are the smallest types of computer being used these days. These have slow speed as compared to super, mainframe & mini computers. Just one man can work on such types of computer. The price is so less that a person can purchase it. So, it is also called PC (Personal Computer). Speed of these computers is measured in Hz, GHz, and MHz. It is being used in small offices, home for calculation & entertainment.