Computer is a fast and accurate electronic system. What is computer? Computer is a fast and accurate electronic system.

Computer have two branches Hardware Software Hardware: In other word the physical components of a computer are called hard ware. Software: A set of is called software. programs Written for a computer

Two types of computer systems 1) Analog 2) Digital

DIGITAL COMPUTER COMPUTER DIGITAL HYBRID COMPUTER ANALOG GENERAL PURPOSE SPECIAL PURPOSE MINI MAINFRAME MICRO SUPER COPUTER Pc-xt PC_AT PC

CENTRAL PROCESSING UNIT ALU ACCUMULATOR General& Special Purpose registry Timing and control unit INPUT DEVICE Microprocessor Microprocessor Out put device Out put device MEMORY

CPU is a brain of computer To primary faction is to excite program

MEMORY Memory Memory have two types they are 1)Primary memory 2)Secondary memory Memory Primary memory Secondary memory Magnetic Tape Ram Rom Prom EPROM Tape Cassettes Magnetic disk Hard Disk Floppy

PRIMARI MEMORY PRIMARY MEMORY is a fast memory it stores program along .Primary memory have four parts RAM ROM PROM EPROM

SECONDRY MEMORY SECONDRY MEMORY IS CALLED AUXILIARY MEMORY. It has there types MAGNETIC TAPE TAPE CASSETTES MAGENETIC DISK . It has two types FLO PPY HARD DISK

INPUT DEVIES Those devices by which we send any commands or information to computer called input device it has four types Keyboard mouse light pen

OUTPUT DEVICE The monitor printer speaker are called out put device

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