THE HISTORY OF COMPUTER

          HISTORY OF COMPUTER

Introduction to computer:

Computer:

A computer is an electronic device, operating under the control of instructions stored in its own memory unit, that can accept data (input). Computer processvdata arithmetically and logically. Computer produce results (output), and store store the results for future use. Most computers also include the capability to communicate by sending and receiving data to other computers and to connect to the internet.

Computer Application
Today computer is being used in every field of life. However, some examples for computer applications are as follows:
1: Controlling space flight.
2: Landing airplanes.
3: Tracking inventory.
4: Turninig on lights at a specified time.
5: Checking out groceries at the checkout counter.

Types Of Computer on the basis of their construction:

1: Analog Computer
2: Digital Computer
3: Hybrid Computer

Analog Computer:-

The analog computer measures continuous types of data and uses a physical quantity that changes along a constant scale.

Digital Computer:-

A digital computer represent data in terms of  discrete numbers and processes data using the standard arithmetic operation, It directly count numbers that represents numerals, letters and other symbols.

Hybrid Computer:-

A hybrid computer combines the best features of analog and digital computers. It consists partly of the components of digital computer and partly of analog to combine the characteristics of both types.

Classification Of Computer:-

1: Supercomputers.          2: main frame computer.
3: Mini computer              4: Micro computers.

Supercomputer:-

Super computers are extremely powerful computers. The term is commonly applied to the fastest high-performance system avaliable at any given time.

Mainframe Computer:-

Mainframe Computers are very powerful large general-purpose computers. They are faster and more powerful than minicomputers.

Minicomputers:-

 Mini computers are relatively small in size and cheaper in cost than mainframe computers. some minicomputers are uniprocessor system whereas some are multiprocessor systems.

Micro Computer:-

Microcomputers is the name given to very small given to very small, low cost and digital computer. It contains a microprocessor unit as its CPU, A memory unit, and equipped with an input and output device to constitute a complete computing system. These small computers are often called personal computers (PCs)

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