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Printers:
Printers: Printers exist in a variety of forms:
Line Printers:
These have been widely used for many years in large computer installations. They are designed for the rapid printing of a large amount of information. Till recently, they have had the disadvantage of being noisy, inflexible, and limited to low quality output. However, because they are extremely reliable, they have remained popular with computer departments and now manufacturers are producing quieter and more flexible models of line-printers.
Character Printers:
These are known as character printers because they print one character at a time. These are of two kinds: impact printers and non-impact printers.
There are two methods to work with files, the first one is through file control blocks or "FCB" and the second one is through communication channels, also identified as "handles".
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