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What is a computer?Its an electronic machine which can accept data in certain form,

process the data ,and give the result of the processing in a specified format as information

InputData is fed into the

computers memory

processingThe computer performs

a set of instructions

And processes the data

outputWe see the result

(out put)on the screen

Computer system consist of tow parts

Hardware:Any electronic part that

u can touch and see

Software:Is a set of instructions,

calls programs which tell the computer what to do

Main memory

Central processing

unitperipherals

Storage devices

input

output

What is the function of:

Central processing unit

.

Main memory:

Peripherals

What is the function of:

Central processing unit

1-excute program instructions.

2-coordinate the activities of all the other units.

3-it’s the brain of the computer.

Main memory:

1-it’s a collection of RAM chips

2 -holds the instructions and data

Peripherals

1 -it’s the physical units attached to the computer.

2-they include storage devices ,input and output devices.

peripheralsStorage

devices Provide a permanent

storage for data and

programs

Input devices (enable data to go into

Computers memory)

OutputExtract the finished

product from the system

hard drives

printermonitormouse Keyboard

DVD drives

flash drives

How to make communication

between the computer and the devices?

We can do it by the port; which we can

plug a wide شrange of peripherals

Modern computers have USB ports