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  • Many companies computerized their offices because computers can do work more quickly and accurately than people. The computer stores and finds information and does calculations. This work is called data processing. The part of the computer that processes the data (information) is called the central processing unit. It contains only electronic components called microchips. A computer can only do what it is instructed to do. This instructions that are stored in a computer are called the computer programs. The parts of the computer used by most people are called terminals. The terminals consist of α keyboard, which looks like a typewriter, and a visual display units, which looks like a television. Information put into the computer on the keyboard is called input. When the computer shows the result of the data processing on the video display unit, it is called output. When a computer goes wrong, it is usually because there is something wrong with the input. In other words it is a mistake made by a person not by a computer. This is sometimes called GIGO (Garbage in, Garbage out).
    Exercise 1. Answer the questions
    1. Why did many companies computerise their offices?
    2. What work does a computer do?
    3. How is this work called?
    4. What is the function of the central processor unit?
    5. What are computer programs?

  • 1 Many companies computerized their offices because computers can do work more quickly and accurately than people.
    2The computer stores and finds information and does calculations.
    3 This work is called data processing.
    4That part of the computer processes the data (information)
    5 This instructions that are stored in a computer are called the computer programs.

    Exercise 1. Answer the questions
    1. Why did many companies computerise their offices?
    2. What work does a computer do?
    3. How is this work called?
    4. What is the function of the central processor unit?
    5. What are computer programs?