Basics of Information Technology

Data:A collection of raw facts and figures.It may consist of numbers, characters,

symbols or pictures.

Information:Organized and processed form of data.

Data and Information

The process of converting data into meaningful information. It consists of following steps:

Data Processing

Data Processing Information

A computer is a machine that can be programmed to accept data, processed data into useful information and store it for later use.

Computer components are :Input devicesProcessing deviceOutput Devices Storage Devices

Computer and its Components

IT is the technology that uses computing with high speed communication links to spread information from one place to another. The interconnection of computers enable people to send and receive information.

The world has become a global village due to advancement in information technology.

Information technology

Information plays an important role in every field.

IT applications are: Internet E-commerce Mobile Commerce Multimedia etc.

Information technology

Software is a set of instruction that tells a computer what to do.

The physical parts of a computer are called hardware. the user can see and touch the hardware.

Hardware and Software

Software is a set of instructions that tells the computer hardware what to do.

Hardware cannot perform any task without software.

Software cannot be executed without hardware.

Relationship b/w Hardware and Software

System software Is a set of programs required to implement

certain functions in a computer system. it controls the operation of computer system.

Examples are Operating system Utility programs Device drivers

Categories of computer software

Application software It is used to perform various applications on

the computer. It helps a computer user to perform specific

tasks. People use app s/w according to their use. E.g it provides audio, video and multimedia

entertainment to users.

Categories of computer software

Examples of Application software are:Spreadsheets Computer GraphicsWord ProcessorsDatabasesEtc:

Application software

InputAnything given to the computer is known as

input such as data and instructions.Input devices is a hardware component that is used to

enter data and instructions into a computer.Examples

KeyboardMouseScannerMicrophone etc

Input devices

Output:The data has been processed into useful information

is called output.

Output Devices:The hardware component that are used to receive

information from the computer.Examples:

MonitorsPrinters Speakers

Output Devices