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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
