INTRODUCTION TO COMPUTERS

WHAT IS A COMPUTER?Computer an electronic device, operating under the

control of instructions stored in its own memory unit

this memory unit can accept data – input manipulate data – process produce information – output store results for future use - storage

USES OF COMPUTERS Playing games. Solving problems. Doing homework. Watching movies. Listening music Browsing. Internet & E-mailing.

EXPANSION OF COMPUTERS

C-> Commonly O-> Operated M-> Machine P-> Purposefully U-> Used for T-> Technical E-> Education R->Research

RESOURCES OF COMPUTER

HardwareSoftwareUser

WHAT IS A HARDWARE?

All physical components of computer are hardware

EXAMPLES OF HARDWARE

KeyboardPrinterMouseScannerMonitorMicrophoneSpeaker

EXAMPLES OF HARDWARE

WHAT IS A SOFTWARESoftware is a computer program

It gives step by step instructions to the computer what to do and how to do.

It converts data into information.

SOFTWARE

TYPES OF SOFTWARE

System softwareApplication Software

WHAT IS A SYSTEM SOFTWARE

System software refers to files and programs that makesup our computer’s operating system.

System files includes library to functions, drives for printers and other hardware configuration files

System programs include assemblers, compilers, debuggers etc

WHAT IS APPLICATION SOFTWARE

Application software is a software designed for computer user to perform specific task.

Word processing, spreadsheets.

USER

User is one who knows how to use both hardware and software

WHAT ARE THE COMPONENTS OF A COMPUTER?

Input devicesProcessorOutput devicesCommunication devicesMemoryStorage devices

INPUT DEVICES

Key BoardMouse

KEYBOARD

MOUSE

TWO TYPES OF MOUSES

Mechanical / BallMouse

Optical /light Mouse

MECHANICAL MOUSE

Mechanical mouse has a

rubber ball, when the mouse

move, rubber ball rolls.

OPTICAL/LIGHT MOUSE

Optical mouse uses the

laser light to detect the

mouse movements.

It does not have a ball.

MOUSE

Every mouse has two button, left button and right

button.

Some mouse has a wheel in the center which is use

for scroll the document up and down.

We can click the mouse in several ways to perform

different tasks.

MOUSE

Left click : when you press and

release the left button once, it is

used to select icons & buttons,

open menu in windows etc.,

MOUSE

Right click : when you press and

release the right button once, it

is used to view properties, access

menu options & fundamentals of

the selected items.

WHAT IS INTERNET?

Internet is a world wide system of computer networks.

a network of networks user at any one computer can get the

information from any other computer through internet.

Some time internet is called as The Net.

WHAT IS WWW

www stands for world wide web This is the most widely part of the internet It works by using special protocols such as

HTTP HTTP is a simple method of cross linking

multiple pages together.

WHAT IS WEB BROWSER Using web, you can get billions pages of

information. To get this information you need to install

special software on your computer. This special software is called as web

browsers. Using web browsers to view different kinds of

information is called as surfing or browsing

POPULAR WEB BROWSERS ARE

Internet Explorer Mozilla Firefox Opera Safari Google Crome

WHAT IS EMAIL?

E-mail is same as normal letter, but it is exchanged in a different way i.e electronically

You can exchanged any type of information such as text, images, videos, office documents

E-MAIL

The only thing you need to send and receive emails you must have E-mail address and internet connection.

You can create your own E-mail Id by using Yahoo,Gmail and hotmail.

SOCIAL NETWORKING SITES

Social Networking sites are web based services

It allows each individual to create public or semi public profile within secure system

Important social networking sites are Facebook, twitter, ibibo,orkut