| Acronym | Definition |
|---|
| P | PM (Post Meridian) |
| P | Park (automatic transmissions) |
| P | Parking |
| P | Pence |
| P | Page |
| P | Power Set (mathematics, set of all subsets) |
| P | Program |
| P | Power |
| P | Porno |
| P | Partner |
| P | Port |
| P | Protection |
| P | Poor |
| P | Pressure |
| P | Path |
| P | Passed (that a bill was approved; US House) |
| P | Philadelphia, PA (mint mark) |
| P | Practical |
| P | Northern Ontario (postal code designation, Canada) |
| P | Para (benzene) |
| P | Polish (rabbit breed) |
| P | Piano (music) |
| P | Personnel |
| P | Parent Corporation (IRB) |
| P | Pilot |
| P | Provider (IETF RFC 2547) |
| P | Progressive Scan |
| P | Portugal (ISO Country Identifier) |
| P | Packed |
| P | Pole |
| P | Priority (logging abbreviation) |
| P | Priority (precedence level) |
| P | Precision |
| P | Proof (coin and stamp collecting) |
| P | Pentium (Intel processor) |
| P | Patrol (US military aircraft designation; as in P-2D) |
| P | Processor |
| P | Plug (electrical connector) |
| P | Punch |
| P | Pulse |
| P | Paragraph (HTML) |
| P | Promoted |
| P | Pause(d) |
| P | Pedigree (breeding and genetics) |
| P | Probability (Statistics, Probability theory) |
| P | Probable (player's likelihood of participating) |
| P | Pursuit (US military aircraft designation, 1925-1947; as in P-51) |
| P | Predicted |
| P | Pointer |
| P | Pitcher (baseball) |
| P | Phillips Petroleum (stock symbol) |
| P | Pegasus (as in PMail) |
| P | Points scored (hockey) |
| P | Posse |
| P | Punctuation |
| P | Pawn (Chess) |
| P | Personal issue (Stores 100 code) |
| P | Provisional |
| P | Problematic |
| P | Precedence |
| P | Partition function (mathematics; number theory) |
| P | Posterior |
| P | Parity |
| P | Proton |
| P | Perch |
| P | Pico- (10^-12, SI Prefix) |
| P | Phosphorus |
| P | Progeny (breeding and genetics) |
| P | Peta- (10^15) |
| P | Pesos |
| P | Peacekeeping |
| P | Poise |
| P | Proline (amino acid) |
| P | Propeller (aircraft type) |
| P | Pouce (French: inch) |
| P | Polynomial (Complexity Theory) |
| P | Permutation (probability) |
| P | Phon (unit of apparent loudness) |
| P | Punter (football) |
| P | Pesetas |
| P | Phosphore (French) |
| P | Phosphoprotein (virus protein) |
| P | Pyrazinamide |
| P | Probability of detection |
| P | Compressional (wave) |
| P | Pultrusion |
| P | Promotable |
| P | Primipara |
| P | Parental Generation (genetics) |
| P | Newspaper Stamp (Scott Catalogue prefix; philately) |
| P | Permeability Constant |
| P | P Sub-Shell (second subshell of an electron shell) |
| P | Onde Prime (Italian: second wave; seismography) |
| P | Primary Body Waves |
| P | Procedure-Required Tuned NAVAID (aviation) |
| P | (before officer title acronym) Past Officer |
| P | US DoT tire speed rating (93 mph) |
| P | First Heartbeat Wave |