Audio, Telephone, RTI (1999-2000): Glossary: P
| PAL | Phase Alternate Lines. Standard for TV and video in certain markets. |
| Carphone module | Phone Module. Module controlling telephone system functions. |
| PIN | Personal Identification Number. Code to prevent unauthorized use of a SIM card. |
| Program | A series of instructions which the computer should follow. |
| Protocol | A series of rules which indicate how data should be transferred between different units in a network. |
| PTY | Program Type. Searching and prioritizing radio stations. |