Tuesday, 7 August 2018

The Information Processing Cycle

Using all its parts together, a computer converts data into information by performing various actions on the data. For example, a computer might perform a mathematical operation on two numbers, then display the result. Or the computer might perform a logical operation such as comparing two numbers, then display that result. These operations are part of a process called the information processing cycle, which is a set of steps the computer follows to receive data, process the data according to instructions from a program, display the resulting information to the user, and store the results.
            The information processing cycle has four parts, and each part involves one or more specific components of the computer:
» Input. During this part of the cycle, the computer accepts data from some source, such as the user or a program, for processing.
» Processing. During this part of the cycle, the computer’s processing components perform actions on the data, based on instructions from the user or a program.
» Output. Here, the computer may be required to display the results of its processing.
            For example, the results may appear as text, numbers, or a graphic on the computer’s screen or as sounds from its speaker. The computer also can send output to a printer or transfer the output to another computer through a network or the Internet. Output is an optional step in the information processing cycle but may be ordered by the user or program.
» Storage. In this step, the computer permanently stores the results of its processing on a disk, tape, or some other kind of storage medium. As with output, storage is optional and may not always be required by the user or program.

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