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

2. 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

3. Two types of computer systems 1) Analog 2) Digital

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

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

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

7. 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

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

9. 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

10. 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

11. OUTPUT DEVICE
The monitor printer speaker are called out put device

12. SOUGATA SARKAR
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