Chapter 5
What Is A Computer?
A computer is an electronic machine, operating under the control of instructions stored in its own
memory that can accept data, manipulate the data according to specified rules, produce results, and
store the results for future use.
Importance of Computer
Computer is the key of IT world. First we’ll get an overall knowledge about the computer.
Information Processing Cycle
Input is any data or instructions you enter into a computer. Output is data that has been processed into
information. Computers process input (data) into output (information).
Storage is an area in a computer that can hold data and information for future use. This series of input,
process, output, and storage activities sometimes is called the information processing cycle. Most
computers today have the capability of communicating with other computers. Thus, communications
also has become an important element of the information processing cycle.
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