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number systems
Three number systems are commonly used with printers:
decimal
is base 10 and uses the digits
0, 1, 2, 3, 4, 5, 6, 7,
8, and 9.
(This is
the
most familiar system.)
hexadecimal
(hex) is base
16
and uses the digits 0,
1, 2, 3, 4, 5, 6, 7, 8,
9, A, B, C, D, E, and F. This is frequently used by programmers. Any
decimal number between 0 and 255 can be expressed by a two-digit
hex number.
binary
is base 2 and uses only the digits 0 and
1.
All information in
computer systems is handled in binary form to represent electrical
signals that are on or off. A binary digit is often called a bit; any
decimal number between 0 and 255 can be expressed by an eight-bit
binary number.
on
line
When the printer is on line, it can communicate with the computer
connected to it.
parallel interface
See inferface.
parity
Parity is a method for a computer and printer to check the reliability of
data transmission.
platen
The black roller that provides a backing for the printing.
print quality
Your printer has two types of print quality: draft and Letter Quality
(LQ). Draft is for high-speed, draft-quality jobs; LQ is for final, polished
documents.
proportional printing
Printing in which the width of the character varies from character to
character. For example, an uppercase W receives much more space than
a lowercase i. The result looks more like a typeset book than a
typewritten draft.
Glossary
GL-5