FIRST TOPIC-

What is Computer?

Computer is an electronic device which is capable of receiving information (data) in a particular form and of performing a sequence of operations in accordance with a predetermined but variable set of procedural instructions (program) to produce a result in the form of information or signals.

A person who makes calculations, especially with a calculating machine.

A computer looks like--

Graph of computer usage between 1800-2010--

Lets come to enemy of computer.

The enemy of computer is-

When virus come to our computer our computer is like-

To protect our computer from virus we use-

ANTIVIRUSSome popular Antivirus companies are-

SECOND TOPIC-

COMPUTER PARTS

1.RAM

2. Central Processing Unit (CPU)

3.Floppy disk

4.Hard disk

5.CD and DVD drives

6.Mouse

7.Keyboard

8.Moniter

9.Printer

10.Speakers

11.Modem

12. UPS - Uninterrupted Power Supply

THIRD TOPIC-

INPUT AND OUTPUTDEVICES

1.INPUT DEVICESDEFINATION-

In computing, an input device is any peripheral (piece of computer hardware equipment) used to provide data and control signals to an information processing system such as a computer or other information appliance.

1.KEYBOARD

2.Image scanner

3.MICRO PHONE

4.GRAPHICS TABLET

5.JOYSTICK

6.LIGHT PEN

7.MOUSE

8.POINTING STICK

9.TOUCH PAD

10.TRACK BALL

11.WEBCAM

12.REFRESHABLE BRAILLE DISPLAY

2.OUTPUT DEVICESDEFINATION-An output device is any piece of computer hardware equipment used to communicate the results of data processing carried out by an information processing system (such as a computer) which converts the electronically generated information into human-readable form.

1.MONITER

2. Refreshable Braille display

3.PRINTER

4.SPEAKERS

5. PLOTTER

BY- DEVANSH

TOMARVI-A6