what is Mainframe Computers

  Mainframe Computers A mainframe computer is a large computer in   terms of price, power and speed. It Was
 introduced in 1975. It is more powerful   than  minicomputer.  It consists of multiple processor.

               

 It is specially designed to perform multiple tasks for multiple users simultaneously. It
designed for high reliability. It often runs twenty-four hours a day. It can be serviced and
upgraded while it is running. It is also known as enterprise server or high-ended server.
Mainframe computer can serve several thousand users simultaneously. Thee
computers can store large amount of data, information and programs. The users access a
mainframe computer through a terminal or personal computer. The price of mainframe
computer is several thousand dollars and can be up to several million dollars. IBM, Sun and
Unisys are leading manufacturers of mainframe computers.
Examples
Examples of mainframe computers are as follows:
•         IBM S-390
•         NEC 610Uses of Mainframe ComputersMainframe computers are used in large organizations such as banks, educational
institutions and government department etc. For example, airlines use these computers to
maintain flight schedules, ticket reservation system etc. Govt. such as NADRA
use mainframe computers to maintain the information of population. Many shopping
interconnect their stores with mainframe computer to track transactions immediately and maintain stock.Supercomputers
Supercomputer is the very fastest and the most powerful computer. It is the biggest in
and more expensive in price than any other computer. It was first developed in early It
is used perform complex tasks. It has a very large storage capacity and can store several
thousand time more data than an average desktop computer. It also consumes so much
energy, It can process trillions of instructions in one second, The modern supercomputer consists of thousands of The cost of one
super computer can be up to several billion dollars.
Examples
•         Roadrunner
•         Blue Gene
•         Deep Blue
•         ASCI White
•         Uses of Supercomputers
Supercomputer is mostly used for weather
predictions, weapon design and atomic research etc.
Super computer is also used in business and industry
field. Aircraft manufacturers use it to simulate aircraft
and check performance. use super computers for different calculations and heavy jobs. Many
Hollywood movies use it for animation purposes.