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3. 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

4. Input Data is fed into the computers memory processing The computer performs a set of instructions And processes the data output We see the result (out put) on the screen

5. 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 unit peripherals Storage devices input output

6. What is the function of: Central processing unit. Main memory: Peripherals

7. 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.

8. peripherals Storage devices Provide a permanent storage for data and programs Input devices ( enable data to go into Computers memory) Output Extract the finished product from the system hard drives printer monitor mouseKeyboard DVD drives flash drives

9. How to make communication between the computer and the devices? We can do it by the port; which we can plug a wide ش range of peripherals Modern computers have USB ports