COMPUTER HARDWARE

BASIC COMPUTER  ELECTRONICS

Computer is an electronic device which takes input , processes it & store & gives output

There are FIVE units 

1. Input Unit.
2. Output Unit.
3. Storage Unit.
4. Central Processing Unit (CPU)
5. Arithmetic and Logic Unit (ALU)
6. Control Unit

INPUT DEVICES = Device which  gives  DATA through  I/P device

1. Keyboard
2. Mouse
3. Joy Stick
4. Light pen
5. Scanner

INPUT DEVICES

OUTPUT DEVICES = Device which gives processed DATA  through O/P device

1. Monitor
2. Speaker
3. Projector
4. Printer 

OUTPUT DEVICES

TYPES OF PROCESSING UNIT

Intel processor
                                                                         

AMD processor (Advanced Micro Devices)

                                                                              

MEMORY
RAM (RANDOM ACCESS MEMORY)

HDD (hard disk drive)

FLOPPY

PENDRIVE

CD (Compact disc)

DVD (digital video disc)

ROM(read-only memory)

The four basic types of computers are

1. Supercomputer. : Its very huge server. It has very high storing capacity, it supports lack & crores of users  . A supercomputer is a computer with a high level of performance compared to a general-purpose computer. Performance of a supercomputer is measured in floating-point operations per second (FLOPS) instead of million instructions per second (MIPS).

SUPER COMPUTER

2. Mainframe Computer. : Its a server computer which can occupy whole room . It supports thousand users login at a time. These computers used primarily by large organizations for critical applications; bulk data processing, such as census, industry and consumer statistics, enterprise resource planning; and transaction processing.

MAIN FRAME COMPUTER

3. Minicomputer. :which allows single user login at a time . Computer that is smaller, less expensive, and less powerful than a mainframe or supercomputer, but more expensive and more powerful than a personal computer. Minicomputers are used for scientific and engineering computations, business-transaction processing, file handling

MINICOMPUTER

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4. Microcomputer :  Its a normal computer which are used in home's. It has got less processing, less storage, it can support multiple user at a time login A microcomputer contains a microprocessor (a central processing unit on a microchip ), memory in the form of read-only memory and random access memory , I/O ports and a bus or system of interconnecting wires, housed in a unit that is usually called a motherboard .

MICROCOMPUTER

THERE IS HIERARCHY OF  COMPUTERS