Computer System

WHAT IS A COMPUTER?

A computer is a sort of electric brain, which capable to solve mathematical problems with in movements or produce desired information or a controlling order. An automatic computer is machine that accepts data at its input, process it by doing some kind of manipulation and the produces at output the desired results. More technically. A computer is a high-speed electronic data processing machine.
Infects an automatic computer may be pictures as a block box into which is fed raw data which as after a slight pauses responds with reports, forecasts, analysis statistics, solutions etc. Infects an automatic computer consists of several sections of equipment each performing a define function. The data is far from raw. A lot of work by skilled people takes place before the data gets the automatic computer can be substation, alteration and indentation, deletions rearrangement, movement, testing logical and arithmetic operations, computers has come to assist humanity in its tasks of collecting, memorizing and analyzing the information

COMPUTER AND THEIR IMPORTANCE: -

A computer is basically a fast calculating machine. It is capable performing most of Arithmetic functions at tremendous speed. The advances in computer science and ENGG. And the reducing trend of cost of the computers have helped an host of general users like engineering business community, scientist, executives administrations, teachers, medicines, students and decision makers. The computer has an own special characteristic and abilities the computers are capable of: -

1) Storing large amount of data
2) Performing scientific and arithmetic calculations at a very speed and very accurately.
3) Plotting of figures and graphics.
4) Self-checking the correctness of the programmed.
5) Helping in taking decisions.

These outstanding features made the computer the most accepted and most widely used device today society. They are being increasing by used in office automation and process control industries.

MAIN PRINCIPLE UNITS OF COMPUTER: - They are

I) INPUT

II) STORE

III) ARITHMATIC

IV) OUTPUT

V) CONTROL UNITS

Computer instruction means request been made to make a take fulfill. A programmed means many instructions are given to make a work done digital means using binary numbers. The computers are classified into 3 types: -

1) MINI FRAME COMPUTERS: - These computers are large equipment like a switching controller in automatic telephone exchange and they are also used for general-purpose machines.

2) MICRO FRAME COMPUTERS: - The micro frame computers are generally used for office establishment and educational instruction and they are also two types 1) PCAT 2) PCXT 3) PCXT

3) MAIN FRAME COMPUTERS: - The computer is used to large machines and for commercial data to be processed they are also used scientific calculations.