| | PEKUSH | | Press Every Key Until Something Happens |
| | pelv | | Protected Extra Low Voltage |
| | PEM | | Privacy Enhanced Mail |
| | PFC | | Private First Class |
| | PFF | | Protection from Fire |
| | pgowm | | please go out with me |
| | PGP | | Pretty Good Privacy |
| | Ph.D. | | Philosophiae Doctor |
| | PHLOTE | | Primary Home Language Other Than English |
| | PHO | | Physician-Hospital Organization |
| | PICBA | | Personal Injury Caused By Accident |
| | PIGHSNTS | | people in glass houses should not throw stones |
| | PILT | | Payments in Lieu of Taxes |
| | PIM | | Personal Information Manager |
| | PIR | | parent in room |
| | PIR | | Parent nearby |
| | PIR | | parents in room |
| | PIR | | passive infrared |
| | PIR | | peak information rate |
| | PIR | | person in room |
| | PK | | player kill |
| | PK | | politcally correct |
| | PK | | public kiss |
| | PKB | | pot calling kettle black |
| | PKB | | pot kettle black (look whos talking!) |
| | PKI | | Public Key Infrastructure |
| | PKOTL | | passionate kiss on the lips |
| | PL&R | | Postal Laws and Regulations |
| | PLD | | programmable logic device |
| | PLLLP | | Professional Limited Liability Limited Partnership |
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