Computer Science XI


Computers are often compared to human beings since both have the ability to accept data, store, work with it, retrieve and provide information. The main difference is that human beings have the ability to perform all of these actions independently.
Human beings also think and control their own activities. The computer, however, requires a program (a predefined set of instructions) to perform an assigned task. Human beings receive information in different forms, such as eyes, ears, nose, mouth, and even sensory nerves. The brain receives or accepts this information, works with it in some manner, and then stores in the brain for future use. If information at the time requires immediate attention, brain directs to respond with actions. Likewise the Central Processing Unit (CPU) is called the brain of the computer. It reads and executes program instructions, performs calculations and makes decisions.

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