What is a computer?

 Computer clipart free images 3

Computer is an electronic device which can be programmed to perform various numerical and non-numerical tasks. It accepts raw input data and processes with a computer program. (A computer program is a set of instruction).  The word “Computer” was derived from latin word “Computare”; it means “to calculate”.

A computer contains various integrated software and hardware components. These components can be used to execute various applications and to provide solutions. A computer is also equipped with a memory which can be used to store data such as programs and processing results. Physical components of a computer such as circuits, wires, hard disks, disk drivers and etc are called hardware. On the other hand, data and programs are called software.

Charles Babbage is known as the father of the computer. In the year 1837 he invented a Analytical machine and it is believed to be the first computer of the world.

There are some basic parts in a modern computer.

Motherboard

It connects all other physical components of a computer.

Processor

It is the brain of a computer. Instructions from Programs are executed by the processor.

Primary Memory

It transfers data between the central processing unit and the storage.

Storage device

It can be used to store data permanently. Ex-hard Drive

Input Devices

Input devices are used to input data into the computer or to communicate with it.

Output devices

Output devices are used to output the processed data or to see the output result. EX-Monitor, Printer

Modern computers are divided into different types based on different sizes which are used in different criteria. Basically there are five types.

1.   Micro Computers

Micro computers are single user computers with less storage capacity and less speed.

2.   Mini computers

Mini computers are mid-range computers.

3.   Mainframe computers

Mainframe computers and multi-user computers.

4.   Super computers

Super computers and the fastest. These computers are very expensive too.

5.  Workstations

Workstations are also single-user computers but with more powerful microprocessors and other components.

 

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