• Describe the main characteristics of common types of input, output
and input/output devices used in commercial computer appli-
cations (7.2).
• Explain the encoding of information for data transmission and
describe components of a data transmission system, including
networks (7.3).
• Describe common methods of preparing data for input to com-
mercial computer systems (7.4).
Printers
The reasons for using a printer are obvious if the computer is used for even
the smallest business purposes. It would be unreasonable to expect account-
ants or an income-tax inspector to look at accounts that can be shown only on
th ...
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