Microsoft Office Tutorials and References
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COM 3
WHAT DOES A COMPUTER DO?
WHAT DOES A COMPUTER DO?
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Information
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Information.
Computers perform four basic operations — input, process, output, and storage. These operations
comprise the information processing cycle . Collectively, these operations change data into
information and store it for future use.
All computer processing requires data. Data is a collection of unprocessed items, which can
include text, numbers, images, audio, and video. Computers manipulate data to create
information. Information conveys meaning and is useful to one or more people. During the output
operation, the information that has been created is put into some form, such as a printed report, or it
can be written on computer storage for future use. As shown in Figure 2, a computer processes
several data items to produce a grade report.
People who use the computer directly or use the information it provides are called computer
users , end users , or sometimes, just users .
DATA
FIGURE 2 A computer processes data
into information. In this example, the student
identification number, semester, course
codes, and course grades all represent data.
The computer processes the data to produce
the grade report (information).
PROCESSES
• Computes each course’s grade points by multiplying
the credits earned by the grade value (i.e.,
4.0 * 3.0 = 12.00)
• Organizes data
• Sums all credits attempted, credits earned, and
grade points (10.00, 10.00, and 36.00)
• Divides total grade points by credits earned to
compute term GPA (3.60)
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