Computers

Introduction to Computers

What is Computer? Computer is a electronic machine that accepts the data as input then processes the data and generates the required output as per the processing instructions given to it by the user.

Characteristics of Computers 1. 2. 3. 4. 5.

Accuracy Speed Versatility Storage Capability No Intellectual Power

What are Input devices? They are used to enter the input i.e. the data and the instructions into the computer's maim memory. There is a wide range of input devices that can be employed according to the nature of the application.

Input Devices 1. 2. 3. 4. 5. 6. 7.

Keyboard Mouse Microphone Touch Screen Bar Code Readers Credit Card Readers Image Scanners

What are Output Devices? The devices that are capable of representing information on a computer are called as output devices. There are important output devices connected to the system unit. They are: 2. 3. 4.

Monitor Printer Speakers

What is Hardware? Hardware generally refers to the physical equipment that performs the basic functions contained within the data processing cycle: Input , Processing and Output. Hardware also includes auxiliary devices called peripherals such as printers, modems and scanners

What is Software? Software is a sequence of instructions design to direct a computer to perform certain functions. There are two types of software 3. System Software 4. Application Software

Project made by Harminder kaur S.S. Mistress G.G.S.S. School Patara Jalandhar