Appendix C
| P |
PA | Program Attention. Used in applications programs. |
PAL | Programmable Array Logic |
parity (check) | Parity checking is the addition of |
| data, resulting in the number of 1 bits being either |
| always even or always odd. Parity is used to detect |
| transmission errors. 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 |
| the function as possible or, parsing the valid |
| parameter from the invalid. |
PC | Personal Computer. |
PCB | Printed Circuit Board. A PCB is an insulating board |
| on which circuit paths have been printed or etched. |
PCBA | Printed Circuit Board Assembly. A PCBA is a PCB |
| that has all of the electrical and mechanical |
| components (resistors, capacitors, ICs, sockets, etc.) |
| mounted on it. |
PGL | Printronix Graphics Language. The software version |
| of the old hardware based IGP that is used in the |
| Printronix PSA line of printers. It provides the same |
| forms and barcode generation capabilities as the |
| IGP. |
PI | Paper Instruction: A signal from the host with the |
| same timing and polarity as the data lines. |
pica | A name indicating a monospaced font with a pitch of |
| 10 cpi and usually a 12 point height. Pica is used in |
| typography as a unit of measurement equal to 1/6 |
| inch. |
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 (cpi). |
pixel | Derived from picture (PIX) ELement. The smallest |
| displayable picture element on a video monitor or |
| printable unit. In printing, a pixel is a dot. |
PMPP | Physical Maximum Print Position. The longest line |
| the printer is capable of printing. This differs from |
| MPP in that the printer may be capable of printing |
| lines 132 characters wide (PMPP), but the print job is |
| only 80 characters wide (MPP). (See also MPP.) |
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