

| Acronym | Sense | Language | Topics | 
|---|---|---|---|
| PCCN | Palier de Protection et de Contrôle Commande Numérique | In French | → Electrical engineering | 
| PCDU | Payload Command Decoder Unit | In English | → Astronautics | 
| PCE | Power Conditioning Electronics | In English | → Electrical engineering → Electronics | 
| PCE | Power Conditioning Equipment | In English | → Electrical engineering | 
| PCF | Payload Control Facility | In English | → Astronautics | 
| PCGN | Point Confort Gaz Naturel | In French | → Energy economics | 
| PCI-E | Peripheral Component Interconnect Express | In English | → Computer science → Electronics | 
| PCIL | Pilot-Controlled Instrument Landing | In English | → Aeronautics, aircraft → Astronautics | 
| PCK | Payload Command Kit | In English | → Astronautics | 
| PCL | Power Control List | In English | → Electrical engineering | 
| PCM | Photoelectric Cell Module | In English | → Energy economics → Electrical engineering | 
| PCM | Power Control Mission | In English | → Electrical engineering | 
| PCME | Physique, Chimie, Mécanique, Électronique | In French | → Higher education, universities → Physics → Chemistry → Mechanical engineering | 
| PCOT | Payload Center Operations Team | In English | → Astronautics | 
| PCP | Power Control Panel | In English | → Electrical engineering | 
| PCPAS | Patriot Command Post Automation System | In English | → Military engineering | 
| PCR | Payload Changeout Room | In English | → Astronautics | 
| PCR | Payload Checkout Room | In English | → Astronautics | 
| PCR | Payload Clean Room | In English | → Astronautics | 
| PCR | Power Change Request | In English | → Quality management → Electrical engineering | 
| PCRD | Programme-Cadre de Recherche et de Développement | In French | → Research policy | 
| PCRDT | Programme Cadre de Recherche et Développement Technologique | In French | → International relations → Mathematics and natural sciences | 
| PCRP | Poste Central de Regroupement de Postes | In French | → Electrical engineering → France | 
| PCRS | Payload Cover Removal System | In English | → Astronautics | 
| PCS | Pacific Command Ship | In English | → 6295 | 
| PCS | Probability of Crew Safety | In English | → Accidents, risks, safety → Aeronautics, aircraft → Astronautics | 
| PCS | Payload Checkout System | In English | → Astronautics | 
| PCS | Payload Control Subsystem | In English | → Astronautics | 
| PCS | Payload Control Supervisor | In English | → Astronautics | 
| PCS | Power Conversion System | In English | → Energy economics → Electrical engineering | 
| PCS | Pouvoir Calorifique Supérieur | In French | → Energy economics | 
| PCSM | Pouvoir Calorifique Supérieur Mensuel | In French | → Energy economics | 
| PCTC | Payload Crew Training Complex | In English | → Education → Astronautics | 
| PCTO | Payload Cost Tradeoff Optimization | In English | → Prices → Astronautics | 
| PCU | Payload Checkout Unit | In English | → Astronautics | 
| PCU | Power Condition Unit | In English | → Energy economics | 
| PCU | Power Conditioning Unit | In English | → Energy economics | 
| PCU | Power Control Unit | In English | → Energy economics | 
| PCU | Power Conversion Unit | In English | → Energy economics | 
| PCVL | Pilot-Controlled Visual Landing | In English | → Aeronautics, aircraft → Astronautics | 
| PCVS | Pouvoir Calorifique Variable Supérieur | In French | → Energy economics | 
| PD&RS | Payload Deployment and Retrieval Subsystem | In English | → Astronautics | 
| PDA | Payload Disconnect Assembly | In English | → Astronautics | 
| PDA | Propellant Drain Area | In English | → Astronautics | 
| PDB | Power Distribution Box | In English | → Energy economics → Electrical engineering | 
| PDC | Power Distribution Control | In English | → Electrical engineering | 
| PDCS | Power Distribution and Control Subsystem | In English | → Energy economics | 
| PDCU | Power Distribution and Control Unit | In English | → Energy economics | 
| PDD | Payload Description Document | In English | → Astronautics | 
| PDDA | Power Driven Decontamination Apparatus | In English | → Environmental technology, water supply, waste management | 
| PDE | Projectbureau Duurzame Energie | In Dutch | → Energy economics | 
| PDE | Producteur Distributeur d'Électricité | In French | → Energy economics → Electrical engineering | 
| PDI | Payload Data Interleaver | In English | → Astronautics | 
| PDM | Payload Deployment Module | In English | → Astronautics | 
| PDP | Payload Data Pack | In English | → Astronautics | 
| PDP | Postinsertion Deorbit Preparation | In English | → Astronomy → Astronautics | 
| PDR | Point De Raccordement | In French | → Energy economics | 
| PDRM | Payload Deployment and Retrieval Mechanism | In English | → Astronautics | 
| PDRR | Payload Design Requirements Review | In English | → Astronautics | 
| PDRS | Payload Deployment and Retrieval System | In English | → Astronautics | 
| PDRS | Payload Data and Retrieval System | In English | → Astronautics | 
| PDRSS | Payload Deployment and Retrieval System Simulation/Simulator | In English | → Astronautics | 
| PDS | Pathfinder Demonstration Satellite | In English | → Astronautics | 
| PDS | Power Distribution System | In English | → Energy economics | 
| PDT | Payload Data Tape | In English | → Astronautics | 
| PDU | Pilot Display Unit | In English | → Human-computer interaction → Aeronautics, aircraft → Astronautics | 
| PDU | Power Drive Unit | In English | → Energy economics | 
| PDU | Pressure Distribution Unit | In English | → Mechanical engineering | 
| PDUG | Plan de Desserte Urbain Gaz | In French | → Regional planning → Energy economics | 
| PE | Primärenergie | In German | → Energy economics | 
| PE | Payload Element | In English | → Astronautics | 
| PE | Project Engineering | In English | |
| PE | Project Engineer | In English | |
| PEA | Payload Electronics Assembly | In English | → Electronics → Astronautics | 
| PEC | Parallel Earth Conductor | In English | → Electrical engineering | 
| PEC | Protective Earth Conductor | In English | → Electrical engineering | 
| PECIP | Productivity Enhancing Capital Investment Program | In English | → Finance | 
| PECP | Preliminary Engineering Change Proposal | In English | |
| PECT | Plan Énergie Climat Territorial | In French | → Regional administration → Energy economics → Meteorology, climatology → Environmental protection | 
| PEDB | Payload Engineering Database | In English | → Astronautics | 
| PEFMC | Proton Exchange Membrane Fuel Cell | In English | → Energy economics | 
| PEFU | Payload Effects Follow-Up Study | In English | → Astronautics | 
| PEGASUS | Partnership for a European Group of Aeronautic and Space Universities | In French | → Specialized or polytechnical colleges → Higher education, universities → Aeronautics, aircraft → Vehicle engineering | 
| PEM | Payload Electronics Module | In English | → Electronics → Astronautics | 
| PEMEX | Petróleos Mexicanos (www.pemex.com) | In Spanish | → Mining → Energy economics → Mexico | 
| PEMFC | Polymer Electrolyte Membrane Fuel Cell | In English | → Vehicle engineering → Electrical engineering → Plastic industry | 
| PEMFC | Proton Exchange Membrane Fuel Cell | In English | → Energy economics | 
| PENCE | Promouvoir Ensemble le Nouveau Confort Électrique | In French | → Electrical engineering | 
| PENELOPE | Promoting ENergy Efficiency to Local Organisations through dissemination Partnerships in Europe | In English | → Energy economics | 
| PEO | Project Engineering Office | In English | |
| PEP | Productibility Engineering and Planning | In English | |
| PER | Preliminary Engineering Report | In English | → Management | 
| PERG | Programme d'Électrification Rurale Global | In French | → Electrical engineering → Regional planning | 
| PERP | Parts and Equipment Reliability Program | In English | |
| PERT | Program Evaluation and Review Technique | In English | → Management | 
| PES | Photoelectric Scanner | In English | → Electronics → Graphic industries, printing, publishing | 
| PESSL | Parallel Engineering and Scientific Subroutine Library | In English | → Programming languages → Mathematics and natural sciences | 
| PET | Protective Earth Terminal | In English | → Electrical engineering | 
| PF | Payload Function | In English | → Astronautics | 
| PF | Powered Flight | In English | → Aeronautics, aircraft → Astronautics | 
| PFB | Payload Feedback | In English | → Astronautics | 
| PFB | Payload Forward Bus | In English | → Computer architecture → Astronautics | 
| PFC | Performance Flight Certification | In English | → Aeronautics, aircraft → Astronautics | 
| PFC | Postflight Checklist | In English | → Aeronautics, aircraft → Astronautics | 
| PFC | Preliminary Flight Configuration | In English | → Aeronautics, aircraft → Astronautics | 
| PFC | Power-Factor-Corrected | In English | → Electrical engineering | 
| PFCF | Payload Flight Control Facility | In English | → Astronautics | 
| PFCS | Primary Flight Control System | In English | → Aeronautics, aircraft → Astronautics | 
| PFI | Plates-Formes Intégratrices | In French | |
| PFK | Payload Function Key | In English | → Astronautics | 
| PFL | Propulsion Field Laboratory | In English | → Research institutes → Aeronautics, aircraft → Astronautics | 
| PFP | Powered Flight Program | In English | → Aeronautics, aircraft → Astronautics | 
| PFRT | Preliminary Flight Rating Test | In English | → Aeronautics, aircraft → Astronautics | 
| PFS | Primary Flight Software | In English | → Software → Aeronautics, aircraft → Astronautics | 
| PFS | Primary Flight System | In English | → Aeronautics, aircraft → Astronautics | 
| PFT | Plate-Forme Technologique | In French | |
| PFT | Postflight Testing | In English | → Aeronautics, aircraft → Astronautics | 
| PFT | Projektträger Produktion und Fertigungstechnologien | In German | |
| PFTA | Payload Flight Test Article | In English | → Aeronautics, aircraft → Astronautics | 
| PFV | Probability of Failure of Vehicle | In English | → Vehicle engineering | 
| PG | Power Generation | In English | → Energy economics → Electrical engineering | 
| PGA | Power Generating Assembly | In English | → Energy economics → Electrical engineering | 
| PGA | Programmable Gain Amplifier | In English | → Electronics | 
| PGD&CS | Power Generation, Distribution, and Control Subsystem | In English | → Energy economics → Electrical engineering | 
| PGEM | Provinciale Gelderse Electriciteits Maatschappij | In Dutch | → Organizations and associations → Sport, physical exercises → Electrical engineering | 
| PGHM | Payload Ground Handling Mechanism | In English | → Astronautics | 
| PGN | Professionnel Gaz Naturel | In French | → Energy economics | 
| PGNC | Professionnel Gaz Naturel Confort | In French | → Energy economics | 
| PGOC | Payload Ground Operations Contract(or) | In English | → Astronautics | 
| PGOR | Payload Ground Operations Requirement | In English | → Astronautics | 
| PGORS | Payload Ground Operations Requirements Study | In English | → Astronautics | 
| PGP | Professionnel Gaz Propane | In French | → Energy economics | 
| PGS | Power Generation System | In English | → Energy economics → Electrical engineering | 
| PGSC | Payload and General-Support Computer | In English | → Computer hardware → Astronautics | 
| PGSE | Payload Ground Support Equipment | In English | → Astronautics | 
| PGU | Power Generating Unit | In English | → Electrical engineering | 
| PhASp | Physics and Astrophysics from Spacelab | In English | → Serial publications, periodicals → Physics → Astronomy → Astronautics | 
| PHD | Payload Handling Device | In English | → Astronautics | 
| PHF | Payload Handling Fixture | In English | → Astronautics | 
| PhiJR | Philips Journal Research | In English | → Serial publications, periodicals → Electronics | 
| PHILEAS | Packaging Hermétique Intégré fiabLE Avancé sur Silicium | In English | → Electronics → Astronautics | 
| PhiRR | Philips Research Reports | In English | → Serial publications, periodicals → Electronics | 
| PhiTR | Philips Technical Review | In English | → Serial publications, periodicals → Electronics | 
| PHMC | Probe Heater Motor Controller | In English | → Mechanical engineering → Vehicle engineering | 
| PHP | Passiefhuis-Platform | In Dutch | → Energy economics → Construction | 
| PHP | Payload Handling Panel | In English | → Astronautics | 
| PHP | Planetary Horizontal Platform | In English | → Astronomy → Astronautics | 
| PHRR | Payload High-Rate Recorder | In English | → Astronautics | 
| PHS | Payload Handling Station | In English | → Astronautics | 
| PHS | Payload Handling System | In English | → Astronautics | 
| PHSF | Payload Hazardous Servicing Facility | In English | → Astronautics | 
| PhTec | Physics in Technology | In English | → Serial publications, periodicals → Physics | 
| PHWR | Pressure Vessel Heavy Water Reactor | In English | → Nuclear technology | 
| PI | Payload Interrogator | In English | → Astronautics | 
| PIA | Payload Interface Adapter | In English | → Astronautics | 
| PIBRAC | PIezo electric BRake ACtuator | In English | → Vehicle engineering | 
| PIC | Payload Integration Center | In English | → Astronautics | 
| PIC | Payload Integration Committee | In English | → Astronautics | 
| PIC | Pyrotechnic Initiator Circuit | In English | → Electrical engineering | 
| PICC | Payload Interface Control Computer | In English | → Computer hardware → Human-computer interaction → Astronautics | 
| PIDA | Payload Installation and Deployment Aid | In English | → Astronautics | 
| PIE | Pistolet à Impulsions Électroniques | In French | → Military engineering | 
| PIE | Payload Integration Equipment | In English | → Astronautics | 
| PIE | Payload Interface Engineer | In English | → Astronautics | 
| PIF | Payload Integration Facility | In English | → Astronautics | 
| PIF | Pilotage d'Interception en Force | In French | → Military engineering | 
| PIF | Productivity Investment Funding | In English | → Finance | 
| PIIT | Parque de Investigación e Innovación Tecnológica | In Spanish | → Research policy | 
| PILS | Payload Integration Library System | In English | → Astronautics | 
| PILS | Payload Interactive Library System | In English | → Astronautics | 
| PIM | Payload Integration Manager | In English | → Astronautics | 
| PINCH | Payload Integration Nominal Cost Hardware | In English | → Computer hardware → Astronautics | 
| PIO | Pilot-Induced Oscillation | In English | → Aeronautics, aircraft → Astronautics | 
| PIOP | Payload Integration Operations Plan | In English | → Astronautics | 
| PIP | Payload Integration Plan | In English | → Astronautics | 
| PIP | Payload Interface Plan | In English | → Astronautics | 
| PIR | Plate-forme Individuelle Roulante | In French | → Mechanical engineering → Construction | 
| PIRCS | Payload Interactive Requirements Collection System | In English | → Astronautics | 
| PiReM | Pipe Rehabilitation Management | In English | → Environmental technology, water supply, waste management | 
| PIRL | Plate-forme Individuelle Roulante Légère | In French | → Mechanical engineering → Construction | 
| PITG | Payload Integration Task Group | In English | → Astronautics | 
| PITS | Payload Integration Test Set | In English | → Astronautics | 
| PITS | Payload Interface Test System | In English | → Astronautics | 
| PIU | Power Interface Unit | In English | → Energy economics | 
| PIV | Peak Inverse Voltage | In English | → Electrical engineering | 
| PIVR | Payload Interface Verification Requirement | In English | → Astronautics | 
| PIVS | Payload Integration and Verification Simulator | In English | → Astronautics | 
| PIVS | Payload Interface Verification Summary | In English | → Astronautics | 
| PKM | Perigee Kick Motor | In English | → Mechanical engineering → Vehicle engineering | 
| PL | Payload | In English | → Astronautics | 
| PL | Postlanding | In English | → Aeronautics, aircraft → Astronautics | 
| PL | Power Level | In English | → Energy economics → Electrical engineering | 
| PL | Prelaunch | In English | → Astronautics | 
| PL | Propellant Loading | In English | → Astronautics | 
| PLA | Programmable Logic Array | In English | → Computer hardware → Electronics | 
| PLA | Parachute Location Aid | In English | → Aeronautics, aircraft → Astronautics | 
| PLACE | Position Location Aircraft Communications Equipment | In English | → Aeronautics, aircraft | 
| PLAGE | Plattform gegen Atomgefahren | In German | → Organizations and associations → Nuclear technology → Military engineering | 
| PLAN | Payload Activity Network | In English | → Astronautics | 
| PLB | Payload Bay | In English | → Astronautics |