1. INTROUCTION TO

2. INTRODUCTION TO COMPUTER Computer comes from the word COMPUTE Compute means TO CALCULATE So computer is calculating device Perform calculations at enormous speed Computer is device that operates upon DATA or INFORMATION E.g. preparing results, calculations, transactions, scientific work etc 3. COMPUTER COMPUTER Computer can input DATA Computer can process DATA Computer can store DATA Computer can retrieve DATAFinally.. computer can be termed as DATA PROCESSOR 4. HOW COMPUTER WORKS 5. CHARACTERSTICS OF COMPUTER Main characteristics of the computer can be summarized as: 1. Speed: Computer is very fast and accurate device. It can process millions and millions of instructions within seconds.2. Accuracy: Computer results are highly accurate. 6. 3. Memory: Computers have a large amount of memory to hold a very large amount of data or information. 4. Programmed Intelligence: Computer are programmed in such a way that they can perform those operations which have been fed into them in the form of executable programs.5. Diligence: Computer is free from problems like lack of concentration, and confusions etc. Computer may never be confused like humans 7. 6. Versatility: We can perform many different types of tasks on computer. One moment it might be busy in calculating the statistical date for annual performance evaluation of a business organization and next moment it might be working on playing movies. 7. Power of Remembrance: Unlike humans, computer can store things for unlimited period of time. 8. TYPES OF COMPUTER ANALOG COMPUTER: An analog computer is a form of computer that uses the continuouslychangeable aspects of physical phenomena such as electrical, mechanical, or hydraulic quantities to model the problem being solved. It represent fractional values exactly, witout round off 9. DIGITAL COMPUTER : A computer that performs calculations and logical operations with quantities represented as digits, usually in the binary number system i.e 0 and 1. HYBRID COMPUTER: A computer that performs calculations and logical operations with quantities represented as digits, usually in the binary number system. 10. CLASSIFICATION OF COMPUTE Computers can be generally classified by size and power as follows, though there is considerable overlap: WORKSTATION: A powerful, single-user computer. A workstation is like a personal computer, but it has a more powerful microprocessor and, in general, a higherquality monitor. 11. MINI COMPUTER: A multi-user computer capable of supporting up to hundreds of users simultaneously. MAINFRAME COMPUTER: A powerful multi-user computer capable of supporting many hundreds or thousands of users simultaneously. SUPER COMPUTER: An extremely fast computer that can perform hundreds of millions of instructions per second. 12. PERSONAL COMPUTER: A small, singleuser computer based on a microprocessor. It is further divided into: Desktop Notebook Hand-held Palmtop Laptop etc 13. ADVANTAGES AND DISADVANTAGES: ADVANTAGES:DISADVANTAGES: Speed Search engine Calculating power Storage CommunicationHealth risks Violation of privacy Public Safety Cannot think itself Cannot manage itself 14. GROUP MEMBERS: 1. AISHA KHURSHID 2. AMBER NAZ 3. NOOR US-SABA 4. MARIA WASEEM TALPUR 5. MEHWISH BALOCH 6. SUMAIYAH ASHRAF 15. THANKYOU..!THE