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 ª1 bitº 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. |
Glossary | 3 |
