| Acronym | Meaning |
 | PVC | Permanent Virtual Circuit - PolyVinyl Chloride - Premature Ventricular Contraction - Primary Visual Cortex |
| PVE | Player Versus Environment |
| PVP | Player Versus Player |
| PVR | Personal Video Recorder |
| PW | Palau (postal Symbol; ISO 3166 Digram) - Petawatt |
| PW | Picowatt |
| PWA | Pirates With Attitude |
| PWC | PieceWise Constant (describing A Mathematical Function) |
| PWL | PieceWise Linear (describing A Mathematical Function) |
| PWLC | PieceWise Linear And Concave/Convex (describing A Mathematical Function) |
| PWP | Plot |
| PWR | Pressurized Water Reactor |
| PX | Post EXchange |
| PY | Paraguay (ISO 3166 Digram) - Person-Year -Portsmouth Yardstick |
| PYF | French Polynesia (ISO 3166 Trigram) |
| PYG | Paraguayan Guarani (ISO 4217 Currency Code) |
| PZ | Panama Canal Zone (ISO 3166 Digram; Obsolete 1980) -Pickup Zone |
| Q1 | First Quarter |
| Q2 | Second Quarter |
| Q3 | Third Quarter |
| Q4 | Fourth Quarter |
| QA | Qatar (FIPS 10-4 Country Code; ISO 3166 Digram) |
| QANTAS | Queensland And Northern Territory Aerial Services |
| QAP | Quadripartite Advisory Publication (kwapp) |
| QAR | Qatari Rial (ISO 4217 Currency Code) |
| QAT | Qatar (ISO 3166 Trigram) |
| QB | Quarterback (football) |
| QC | Quality Control -Qu?bec (postal Symbol) -Queen's Counsel |
| QCA | Qualifications And Curriculum Authority - Quality Council Of Alberta |
| QCD | Quantum ChromoDynamics |
| QD | Quaque Die (Latin |
| QDOS | Quick And Dirty Operating System (cue-doss) |
| QDR | Quadrennial Defense Review |
| QED | Quantum Electrodynamics -quid Es Demonstrata Or Quod Erat Demonstrandum (Latin |
| QEH | Queen Elizabeth's Hospital |
| QFE | Quoted For Emphasis -Local Ground Level Atmospheric Pressure (aeronautical Q Code) |
| QID | Quater In Die (Latin |
| QIP | Quadrilateral Interoperability Programme (ancestor Of MIP; Quip) |
| QK | Air Canada Jazz (IATA Airline Designator) |
| QLD | Queensland |
| QM | Quality Management - Quantum Mechanics - Queen Mother |
| QNH | Regional Mean Sea Level Atmospheric Pressure (aeronautical Q Code) |
| QPR | Queens Park Rangers (English Football Team) |
| QPS | Quark Publishing System |
| QR | Quake Rally - Qualitative Reasoning - Queensland Rail - Queen's Rangers - Quick Release - Quiet Riot -Qatar Airways (IATA Airline Designator) |
| QS | Quantum Sufficit (Latin |
| QSCAT | Quick Scatterometer Satellite |
| QSL | Qu?bec Sign Language |
| QSO | Quasi-Stellar Object |
| QSTAG | Quadripartite Standardization Agreement (cue-stag) |
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