Computer

What is a Computer?

The computer is a versatile electronic machine. Man has ever created. The computer has made a great impact on our life be it Home, School, College, Libraries, Retail store, etc.

What does a computer do?

Computer can perform four general operations, which comprise the processing cycle:

1) Input

2) Process

3) Storage

4) Output

Types of computer:

There are two types of computer, which are as follows:

1) Analog

2) Digital


1) Analog computer:- Analog computer handle or process information which is of a physical nature, as for example Temperature, Pressure, etc.

2) Digital computer:- Digital computer process information in a binary or two-state from namely Zero and one.

Types of digital computer

1) Macro Computer

2) Mini Computer

3) Mainframe Computer

4) Super Computer

Trackball

Trackball is also a pointing device that contains a ball that can rotate in any direction. The user spin the ball to move the cursor on the monitor.

Voice Recognization System

Voice Recognization is an input device, that translates human speech into electrical signals.

Scanner

Scanner is a kind of an input device in which direct information stored in the permanent program. The main advantage of direct information is that user have do not type any information. They provide handwritten text.

Types of scanner

1) Handled Scanner

2) Flatbed Scanner

3) Drum Scanner

Output Device

Printer-: Printer is the most popular Output Device. They provide permanently readable programs that give a hard printed copy of the output.

Types of Printer

1) Impact Printer

2) None Impact Printer

Computer Software

Computer hardware in itself cannot perform any useful task. Hardware is a moveable device from one place to another like Keyboard, Mouse, Monitor, CPU, etc

Software is a logical part of the computer system and that cannot move from one place to another like MS-office, MS-word, etc.