What is Computer?

 A computer is an electronic device which transforms data into meaningful information.

Characteristics of computer:

1) Fast 

2) Accurate

3) diligent

4) Adaptable

5) Good storage capacity.

Functions of computer:

1) Accepts data 

2) Stores data 

3) Processes data as required

4) Retrieves the stored data as and when required.

5) Prints the result in the required format.

Types of computer:

1) Microcomputer: It is a single user computer system with a single ship and moderately powerful microprocessor. The difference types of microcomputers are:

a) Desktop computer

b) Laptop computer

c) notebook 

d) Tablet

2) Mini Computer: It is a computer which can support hundreds of users simultaneously and has more powerful processors than a microcomputer. It is also called mid- range computer.

3) Main frame: Main computer is a multi user system,like a minicomputer but the technology is different than that of a minicomputer. It is used to handle and process large amount of data, such as in banks and government offices.

4) Super Computer: It is the fastest and most expensive computer system. It is used for complex scientific computations and numerical calculations such as weather broadcasting, nuclear simulations and astrophysics.

Peripheral Devices: Peripheral devices are the input/output devices that are typically used to feed information and instructions into a computer for storage of processing, and to show an output.

Input Devices: Input devices are:

a) Keyboard

b) Mouse

c) Scanner

d) Microphone

Output Devices: Output devices are:

a) Printer

b) Speaker

c) Monitor

Storage Devices:

a) Hard Disk

b) CD-ROM

c) Floppy Disk