1. Computer Computer is an electronic device which operates on data, analysis the data and then applies the instruction to this data in order to perform a particular task.

3. ComputerHardware and SoftwareConcept

4. Computer Hardware Hardware is the component that can be seen and touched.

5. Components of Hardware

6. Input devices Input devices enable user to enter information and command into the computer

7. Some input devices are: Keyboard Mouse Joystick Scanner Touch pad Light pen Bar code readers Voice input system

8. Output devices Output devices are used to supply processed data.

9. Some output devices are: Monitor Printers Speakers Plotters

10. Processing devices Processing devices process the data as per the instructions and send the results to the output devices.

12. Storage devices Storage devices are those which store the data in its memory.

14. Computer software Software means a program which is installed on a machine for a specific purpose.

15. Types of software

16. System Software A system software handle the hardware of a machine which configure the hardware penetration. Example: Windows, DOS, UNIX, VIPRO.

17. Application Software An application software is meant to establish relation between utility software and system software.

18. Utility Software These are the software is the software generally provided by the vendors as readymade packages to do some specific operations.