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Paper bail
The part of the printer that holds the paper against the platen.
Paper-out sensor
A small switch behind the platen that sends a signal when it is not in
contact with paper.
Parallel interface
An interface is the connection between the computer and the printer.
There are two types: a parallel interface transmits data one character
or code at a time, and a serial interface transmits data one bit at a
time.
Pica
A character width with 10 characters per inch (cpi). This is usually
the standard or default character width.
Pitch
Indicates the number of characters per inch (cpi). For example, 10
pitch printing is 10 cpi.
Platen
The black roller that provides a backing for the printing.
Proportional printing
Printing in which the width of the character varies from character to
character. Therefore, a capital W, for example, receives much more
space than a lowercase i.
Random Access Memory The portion of the printer’s memory used as
a buffer and for storing user-defined characters. All data stored in
RAM is lost when the printer is turned off.
Reset
Returning a printer to its
defaults,
with either a command, an INIT
signal, or by turning the printer off and on.
ROM
Read Only Memory The portion of the printer’s memory that is
permanent. The printer uses the information in the ROM, but the
information cannot be changed.
Glossary
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