What is Computer

  Introduction to computer

Introduction

A computer is an electronic machine that work very fast. It can be used for storing lost of information. 

We watch movies, play games, send and receive massage, draw pictures and do lot more with the help of computer. 

Human Being and Computer 

Human has made a wonderful machine called computer. Computers cannot work on their won. They do what you want them to do. You need to give them the right command. 

Computer different from human beings in many ways. Let us discuss some of them. 

           Computer                                           Human Being

*Computer work very fast.               *Human cannot work very fast.

*Computer never makes any            *Human can make mistake. 

   mistake.

*A computer never gets tired.          * Human gets tired. 

*It does not forget any information *Human can forget information.

  stored in it. 

*A computer cannot take its own    *Human can take their own 

  decisions, it always need                 decisions. 

  instructions from human.

Type of computer

Computer are available in different types. 

Desktop computer

Desktop computers is a computer that is kept on a desk. It is big in size. It cannot be carried  from one place to another. 

Laptop 

It is small computer that can be easily kept on our laps. 

It can be carried from one place to another. 

Palmtop

It is a very small computer that can fit into the palm of our hand. 

Palmtop can be carried around in our pockets also. 

First computer was developed around the year 1940. It was a large as a classroom. 

RAM -, Ramadan acces Memory 

ROM -,Read Only Memory

UPS- Ultra Power Supply

CPU - Central Proceeding Unit

LCD - Liquid Critical Display

Parts of Computer

Computer has four main parts – Monitor, Keyboard, Mouse, and CPU.Each parts has a special function.

Monitor

Monitor is a device that displayed word and pictures. It is also called Visual Display Unit (VDU)

Keyboard

 

It has many buttons called keys. It is used to type numbers, letters and other symbols. Whatever you type on the keyboard appears on the monitor.

Mouse

It is a pointing device. It is joined by a cable to a computer. It is used for pointing at things and drawing pictures on a computer.

It is also used for selecting things on computer.

CPU

CPU is the brain of a computer. It processes the instructions and gives result. It is the most important part of a computer.

Now let us discuss some other parts of the Computer.

Printer

It helps you to get your work on the paper. It is used to print the things that are shown on the monitor.

Taking a copy of your work on paper is called printout.