Computer Definition

What is Computer?

Computer is an electronic machine that is used to specialized design for accepting the data, processes it and gives result.

Process Diagram

The computer performs the task according to the instructions that is imposed by a program. This means that computing operations are totally dependent on program and its instructions.

Computer Devices:-

Computer devices are categorized into three groups:-

1. Input Device
2. Process Device
3. Output Device

1. Input Device:-

Input device is used to input the data into the computer. Such as, Keyboard, Mouse, Light Pen etc.

2. Process Device:-

The Process device is used to perform the operation into the computer; it is called CPU (Central Processing Unit) and that is known as brain of computer.

Logically, it is divided into three sectors.

a) ALU
b) CU
c) MU

a) ALU

ALU is used to arithmetic & logical operation in CPU.

b) CU

CU is used to maintain and control the operation executing in CPU.

c) MU

MU is used to store the data temporarily during the processing in CPU.

3. Output Device:-

It is used to display or print on the screen or paper or other devices. Such as Monitor, Printer, Projector, Plotter etc.

Merits:-

• It is used to fast operation.
• It is provided to us accurate result.
• Data’s results are store.
• Improve the productivity of organization.
• It is easy to learn.
• It is versatile; this means that is used in every field.

Demerits:-

• Computer cannot thing.
• Computer cannot learn from experience.
• It is totally dependent on program and its instructions.
• A user required to operate the system.

Applications:-

• In sports
• In hospital
• In banking sector
• For entertainment
• For online education
• For e-commerce
• For stores bulk of data
• For data sharing