1. WHAT IS HARDWARE ? Computer hardware is the collection of physical elements that comprise a COMPUTER SYSTEM LIKE A MOUSE, MONITOR, KEYBOARD, SPEAKER MICROPHONE, SYSTEM UNIT, SCREEN MEANS WE CAN TOUCH ALL PHYSICAL ELEMENTS HARD WARE IS VERY IMPORTANT PART OF COMPUTER SYSTEM.

2. WHAT IS SOFTWARE? COMPUTER SOFTWARE IS A COLLECTION OF COMPUTER PROGRAMME AND RELATED DATA PROVIDE THE INSTRUCTION FOR TELLING A COMPUTER WHAT TO DO AND HOW DO IT. THAT IS SOFTWARE. SOFTWARE IS UNTOUCHABLE.

3. TYPES OF SOFTWARE 1.System software 2.Application software 3.Utility software System software Application software Utility software

4. Software languages C An advanced programming languages used for software application development. Originally developed by Dennis Ritchie. C++ Descendant of the c language. Visual basic A language developed by Microsoft based on the basic language. Vb is used for creating window application. Java A powerful and flexible language created by sun micro system that can be used applets.

5. Operating system is a computer programme which is responsible for resources main function of os is a interface between computer hardware and user Memory and file manager Hardware and software related problems solved by operating system. Dos, windows,95,98,2000,window xp, window vista, window anti server, linux, unix……………. Operating system

6. Interface are two type Cui full form character user interface Gui full form graphical user interface Cui means we work only by command for example copy con means to make a new file Copy con file name enter Gui means we work by graphic ex window Gui is very easier then cui

7. Types of operating system Batch operating system:- Batch operating system is the operating system which analyzes your i/p and groups them into batches. Batch operating systems could only execute one program at a time. Use :- payroll, statistical analysis. Multi programming operating system:- several programs are run at the same time on a uniprocessor. Time sharing operating system :- is sharing a computer resources among many users by means of mutiprogarmming and multi tasking. Real time system :- A real-time system is one that must process information and produce a response within a specified time

8. Example of operating system Dos disk operating system Windows 95 Windows 98 Windows 2000 Windows xp Windows vista Windows nt work station Unix and Linux