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Appendix D
NOVRAM Acronym of NonVolatile Random-Access Memory.
See

also

nonvolatile memory.
O
OCR Optical Character Recognition is the process by which
a machine reads characters printed in a special
standardized font. Data are read by a photoelectric
optical scanner and recorded on magnetic tape or disk.
OCR-A and OCR-B are two widely used fonts.
P
Parity (check) Parity checking is the addition of non-data bits to data,
resulting in the number of 1 bits being either always
even or always odd. Parity is used to detect
transmissionerrors. Parity represents the value in the
check digit of the received or transmitted data.
Parsing Parsing is the process of separating a programming
statement into basic units that can be translated into
machine instructions. A printer can recover from an
erroneous code sequence by performing as much of
thefunctionaspossibleor,parsingthevalidparameter
from the invalid.
PI Paper instruction: A signal from the host with the same
timing and polarity as the data lines.
Pin configuration Establishes the physical attachment and protocol
conversion connections for the host interface.
Pitch The number of text characters printed per horizontal
inch. Specified in characters per inch or cpi.
Pixel Acronym of picture element or picture cell. The smallest
displayable picture element on a video monitor or
printable unit in a printer.
Point Auni t of measure in printing and typography, used to
specify type sizes, heights of font characters, etc. There
are 72 points in a vertical inch; thus, one point equals 1/
72 inch, or approximately 0.0138 inch. Examples: This is 6
pointtype. This is 10 poi nt type. This is 16 point

type.

Print Mode The horizontal and vertical dot density at which the
characters are printed.