explain how computer process data and display it on as output devise
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Answer:
How Computers Work: Input and Output
The central processing unit is the unseen part of a computer system, and users are only dimly aware of it. But users are very much aware of the input and output associated with the computer. They submit input data to the computer to get processed information, the output.
Sometimes the output is an instant reaction to the input. Consider these examples:
Zebra-striped bar codes on supermarket items provide input that permits instant retrieval of outputs - price and item name - right at the checkout counter.
A bank teller queries the computer through the small terminal at the window by giving a customer's account number as input. The same screen immediately provides the customer's account balance as output.
A forklift operator speaks directly to a computer through a microphone. Words like left, right, and lift are the actual input data. The output is the computer's instant response, which causes the forklift to operate as requested.
A medical student studies the human body on a computer screen, inputting changes to the program to show a close-up of the leg and then to remove layers of tissue to reveal the muscles and bone underneath. The screen outputs the changes, allowing the student (without donning a mask, sanitary gloves, or operating gown) to simulate surgery on the computer.
A sales representative uses an instrument that looks like a pen to enter an order on a special pad. The handwritten characters are displayed as "typed" text and are stored in the pad, which is actually a small computer.
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