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Glossary
logical link The parameters that specify data transfer, data control, and/or data
communication operations.
macro A macro is a collection of control codes, escape sequences, and
data whose execution can be initiated by using a single command.
This information is downloaded into the printer.
MPP Acronym for Maximum Print Position. Also known as line
length.
NMI Acronym for Non–Maskable Interrupt.
non impact Printing which does not result from any mechanical impact onto
the paper. Example: an electrophotographic printer.
OPC The material of the OPC drum is an insulator when in the dark
and is conductive when exposed to light.
operating system A collection of programs that control the overall operation of a
computer system.
parity (check) Parity checking is the addition of a non–data bit to data, resulting
in the number of “1 bit” being either always even or always odd.
Parity is used to detect transmission errors. Parity represents
value in the check digit of the received or transmitted data.
PCB Acronym for Printed Circuit Board. A PCB is an insulating board
on which circuit paths have been printed or etched.
PCBA Acronym for Printed Circuit Board Assembly.
port A data channel used for receiving data from or transmitting data
to one or more external devices.
protocol The rules and conventions that govern communication between a
printer and a host computer. A protocol includes codes for
printing text and graphics and codes instructing the printer to
perform special operations.
RAM Acronym for Random Access Memory. Can be read from or
written to at any time. RAM is volatile: Whatever is in RAM is
lost when power is turned off.