| Acronym | Sense | Language | Topics |
|---|---|---|---|
| PSL | Pressure Seal | In English | → Mechanical engineering |
| PSM | Power Storage Module | In English | → Energy economics |
| PSM | Propellant Storage Module | In English | → Astronautics |
| PSMI | Pryde Schropp McComb, Inc (www.psmi.ca) | In English | → Civil engineering → Transport and postal services → Canada |
| PSO | Polskie Składy Oponiarskie | In Polish | → Automobile manufacturing → Poland |
| PSP | Payload Signal Processor | In English | → Astronautics |
| PSP | Payload Specialist Panel | In English | → Astronautics |
| PSP | Payload Support Plan | In English | → Astronautics |
| PSP | Planetary Scan Platform | In English | → Astronautics |
| PSP | Planetary Scan Probe | In English | → Astronautics |
| PSPA | Pilotage des Systèmes de Production Automatisée | In French | → Mechanical engineering |
| PSR | Payload Safety Review | In English | → Accidents, risks, safety → Astronautics |
| PSS | Propulsion Support System | In English | → Vehicle engineering |
| PSS | Payload Specialist Station | In English | → Astronautics |
| PSS | Payload Status System | In English | → Astronautics |
| PSS | Payload Support System | In English | → Astronautics |
| PSS | Propellant Supply Subsystem | In English | → Aeronautics, aircraft → Astronautics |
| PSS | Propulsion Subsystem | In English | → Vehicle engineering |
| PSS | Procédé de Stabilisation et Solidification | In French | → Environmental technology, water supply, waste management |
| PSSP | Payload Specialist Station Panel | In English | → Astronautics |
| PSTL | Pressure Model Static and Transient Launch Configuration | In English | → Astronautics |
| PSU | Power Switching Unit | In English | → Energy economics → Electrical engineering |
| PSU | Power Supply Unit | In English | → Computer hardware → Electrical engineering |
| PSV | Planetary Space Vehicle | In English | → Astronautics |
| PSV | Probability of Vehicle Success | In English | → Astronautics |
| PSW | Paris Space Week | In English | → Congresses → Astronautics |
| PT | Propulsion Test | In English | → Vehicle engineering |
| PT | Power Transfer | In English | → Energy economics |
| PTA | Propulsion Test Article | In English | → Vehicle engineering |
| PTAN | Preschool Technical Assistance Network | In English | → Education |
| PTB | Physikalisch-Technische Bundesanstalt | In German | → Physics |
| PTB | Payload Timing Buffer | In English | → Astronautics |
| PTCC | Propulsion Test Control Center | In English | → Astronautics |
| PTCS | Propellant Tanking Computer System | In English | → Computer hardware → Astronautics |
| PTD | Preliminary Technical Directive | In English | |
| PTD | Provisioning Technical Documentation | In English | |
| PTE | Plate-forme Technologique Européenne | In English | |
| PTO | Power Test Operation | In English | → Energy economics |
| PTR | Prestation Technologique Réseau | In French | |
| PTR | Projektträger Reaktorsicherheitsforschung | In German | → Nuclear technology |
| PTR | Program Technical Review | In English | → Management |
| PTS | Payload Test Set | In English | → Astronautics |
| PTS | Payload Transportation System | In English | → Vehicle engineering → Astronautics |
| PTSF | Payload Trunnion Support Fixture | In English | → Astronautics |
| PTV | Pathfinder Test Vehicle | In English | → Astronautics |
| PU | Power Unit | In English | → Energy economics → Electrical engineering |
| PU | Propellant Unit | In English | → Astronautics |
| PU | Propellant Utilization | In English | → Astronautics |
| PUC | Poste Urbain Compact | In French | → Electrical engineering |
| PUCE | Programme pour l'Utilisation des Composants Électroniques | In French | → 621038 |
| PUCS | Propellant Utilization Control System | In English | → Astronautics |
| PUGS | Propellant Utilization and Gauging System | In English | → Astronautics |
| PUMA | Programme pour l'Utilisation des Matériaux Avancés | In French | → 620 |
| PUMA | Prix Unitaire Moyen des ouvrages gAz | In French | → Prices → Energy economics |
| PUV | Propellant Utilization Valve | In English | → Astronautics |
| PV | Photovoltaic | In English | → Energy economics |
| PVA | Preburner Valve Actuator | In English | → Astronautics |
| PVA | Propellant Valve Actuator | In English | → Astronautics |
| PVDS | Propellant Vent and Drain System | In English | → Astronautics |
| PVED | Propulsion And Vehicle Engineering Division | In English | → Vehicle engineering |
| PVO | Pioneer Venus Orbiter | In English | → Astronautics → Astronomy |
| PVR | Precision Voltage Reference | In English | → Electrical engineering |
| PVT | Preflight Verification Test | In English | → Aeronautics, aircraft → Astronautics |
| PVT | Pyrotechnic Verification Test | In English | → Astronautics |
| PVTCS | Photovoltaic Thermal Control System | In English | → Energy economics |
| PWA | Pratt and Whitney Aircraft | In English | → Aeronautics, aircraft |
| PWA | Printed Wiring Assembly | In English | → Electronics |
| PWB | Printed Wiring Board | In English | → Electronics |
| PWDS | Protected Wire Distribution System | In English | → Electrical engineering |
| PWGSC | Public Works and Government Services Canada (www.tpsgc-pwgsc.gc.ca) = TPSGC | Travaux Publics et Services Gouvernementaux Canada | In French |
In English | → Central administration → Civil engineering → Canada |
| PWMD | Printed Wiring Master Drawing | In English | → Electronics |
| PWR | Pressurized Water Reactor = REP | Réacteur à Eau Pressurisée | In French = DWR | Druckwasserreaktor | In German |
In English | → Nuclear technology |
| PWR | Politechnika Wrocławska | In Polish | → Specialized or polytechnical colleges |
| PWT | Propulsion Wind Tunnel | In English | → Vehicle engineering |
| PZMKiMK | Polski Zwiazek Modelarzy Kolejowych i Milosników Kolei | In Polish | → Entertainment → Rail transport engineering |
| QAVT | Qualification Acceptance Vibration Test | In English | → Quality management → Mechanical engineering |
| QCM | Quartz Crystal Microbalance | In English | → Electronics |
| Qe2 | Quantock Energy & Environment | In English | → Energy economics → Environmental technology, water supply, waste management |
| QFP | Quad Flat Pack | In English | → Electronics |
| QMS | Qualification Model Spacecraft | In English | → Astronautics |
| QRSL | Quick-Reaction Space Laboratory | In English | → Research institutes → Astronautics |
| QSE | Qualité, Sécurité, Environnement | In French | → Quality management → Environmental technology, water supply, waste management |
| QT | Qualification Test | In English | |
| QTP | Qualification Test Plan | In English | |
| QTP | Qualification Test Procedure | In English | |
| QTR | Qualification Test Report | In English | |
| QTV | Qualification Test Vehicle | In English | → Astronautics |
| QVT | Qualified Verification Testing | In English | |
| R&D | Recherche et développement = F&E | Forschung und Entwicklung | In German = R&D | Research and Development | In English = I+D | Investigación y Desarrollo | In Spanish = R&S | Ricerca e Sviluppo | In Italian = P&D | Pesquisa e Desenvolvimento | In Portuguese = O&O | Onderzoek en Ontwikkeling | In Dutch = FoU | Forsøk og Utvikling | In Norwegian |
In French | → Research policy |
| R&D | Research and Development = F&E, I+D, R&S, P&D, O&O, FoU (look above) |
In English | → Research policy |
| R&DO | Research and Development Operations | In English | → Research policy |
| R&E | Research and Engineering | In English | → Research policy |
| R&S | Ricerca e Sviluppo = R&D, F&E, I+D, P&D, O&O, FoU (look above) |
In Italian | → Research policy |
| R&T | Research and Technology | In English | → Research policy |
| R2I | Réseau Industriel d'Innovation | In French | → Research policy → Industry, industrial policy |
| RAD | Research and Advanced Development | In English | → Research policy |
| RADO | Radiation Dosimetry | In English | → Radioactivity → Astronautics → Astronomy |
| RADO-HTR | Radiation Dosimetry - High Temperature Ratio | In English | → Radioactivity → Astronautics → Astronomy |
| RAE | Royal Aerospace Establishment | In English | → Aeronautics, aircraft → Astronautics |
| RaEE | Radio and Electronic Engineer | In English | → Serial publications, periodicals → Telecommunications → Electronics |
| RAéS | Réseau Recherche Aéronautique sur le Supersonique | In French | → Aeronautics, aircraft |
| RAG | Réseau d'Alimentation Générale | In French | → Energy economics → France |
| RAI | Radar Altimeter Indicator | In English | → Aeronautics, aircraft → Astronautics |
| RAI | Roll Attitude Indicator | In English | → Astronautics |
| RAI | Rijwiel en Automobiel Industrie | In Dutch | → Automobile manufacturing |
| RAID | Regional Association for Irrigation and Drainage = ARID | Association Régionale pour l'Irrigation et le Drainage | In French |
In English | → Associations → 627 → Agricultural sciences |
| RALPH | Reduction and Acquisition Of Lunar Pulse Heights | In English | → Astronomy → Astronautics |
| RALT | Radar Altimeter | In English | → Aeronautics, aircraft → Astronautics |
| RANN | Research Applied to National Needs | In English | → Research policy |
| RAP | Reserve Auxiliary Payload | In English | → Astronautics |
| RAPCON | Radar Approach and Control | In English | → Aeronautics, aircraft → Astronautics |
| RAPHAEL | ReActor for Process heat, Hydrogen And ELectricity generation | In English | → Energy economics |
| RAPID | Revolutionary Avalanche Photodiode Infrared Detector | In English | → Electronics → Tourism |
| RAS | Remontée Aéro-Souterraine | In French | → Energy economics → Electrical engineering |
| RASM | Remote Analog Submultiplexer | In English | → Electrical engineering |
| RATCC | Radar Air Traffic Control Center | In English | → Aeronautics, aircraft |
| RATO | Rocket-Assisted Takeoff | In English | → Astronautics |
| RAWS | Role-Adaptable Weapons System | In English | → Military engineering |
| RBE | Relative Biological Effectiveness | In English | → Pharmacology, toxicology → Nuclear technology |
| RBS | Radar Bomb Scoring | In English | → Military engineering |
| RC | Resistance-Capacitance | In English | → Electrical engineering |
| RCB | Remote Circuit Breaker | In English | → Electrical engineering |
| RCC | Rough Combustion Cutoff | In English | → Vehicle engineering |
| RCC-C | Règles de Conception et de Construction des Assemblages de Combustible des Centrales Nucléaires | In French | → Nuclear technology |
| RCC-E | Règles de Conception et de Construction des Matériels Électriques des Centrales Nucléaires | In French | → Nuclear technology |
| RCC-G | Règles de Conception et de Construction du Génie Civil des Îlots Nucléaires REP | In French | → Nuclear technology |
| RCC-M | Règles de Conception et de Construction des Matériels Mécaniques des Îlots Nucléaires REP | In French | → Nuclear technology |
| RCC-MR | Règles de Conception et de Construction des Matériels Mécaniques des Îlots Nucléaires RNR | In French | → Nuclear technology |
| RCCA | Rough Combustion Cutoff Assembly | In English | → Vehicle engineering |
| RCCB | Remote Central Circuit Breaker | In English | → Electrical engineering |
| RCD | Réacteur Complétement Déchargé | In French | → Nuclear technology |
| RCM | Reciprocating Chemical Muscle | In English | → Mechanical engineering → Chemical technology |
| RCO | Radio Comptoir de l'Ouest | In French | → Trade → Electronics |
| RCS | Reentry Control System | In English | → Astronautics |
| RCS | Roux-Combaluzier-Schindler | In French | → Mechanical engineering |
| RD | Route Départementale | In French | → Civil engineering and land transport → Transport and postal services |
| RDI | Radar Doppler à Impulsions | In French | |
| RDS | Rocketdyne Digital Simulator | In English | → Astronautics |
| RDT | Réseau de Développement Technologique | In French | |
| RDTC | Réseau de Développement Technologique Corse | In French | |
| RDW | Rijks Dienst voor het Wegverkeer (www.rdw.nl) | In Dutch | → Central administration → Vehicle engineering → Netherlands |
| RE | Responsible Engineer | In English | |
| REA | Rocket Engine Assembly | In English | → Astronautics |
| ReAA | Recherches Aéronautiques et Aérospatiales | In French | → Serial publications, periodicals → Aeronautics, aircraft → Astronautics |
| REACM | Regional Energy Agency of Central Macedonia | In English | → Energy economics |
| REAM | Rocket Engine Assembly Module | In English | → Astronautics |
| REB | Réacteur à Eau Bouillante = BWR | Boiling Water Reactor | In English = SWR | Siedewasserreaktor | In German |
In French | → Nuclear technology |
| REC | Regional Electricity Company | In English | → Energy economics → Electrical engineering |
| RECIFE | REcherche sur la Capacité des Infrastructures FErroviaires | In French | → Rail transport engineering → Rail transport → France |
| REDAC | Rockwell Electronic Design Analysis Code | In English | → Electronics |
| REDB | Rockwell Engineering Data Base | In English | |
| REEEP | Renewable Energy and Energy Efficiency Partnership | In English | → Energy economics |
| REEP | Radio Engineering and Electronic Physics | In English | → Serial publications, periodicals → Telecommunications → Electronics |
| REFIDI | Résidus d'Épuration des Fumées d'Incinérateur de Déchets Industriels | In French | → Environmental technology, water supply, waste management |
| REFIOM | Résidu de Fumée d'Incinération d'Ordures Ménagères | In French | → Environmental technology, water supply, waste management |
| REG | Régie des Eaux de Grenoble | In French | → Environmental technology, water supply, waste management |
| REG | Résistances Électriques et Gazières | In French | → Electrical engineering |
| REGBIE | Regional Bioenergy Initiatives around Europe | In English | → Energy economics |
| REIO | Renewable Energy Information Office | In English | → Energy economics |
| REM | Rocket Engine Module | In English | → Astronautics |
| RENAEL | Rete Nazionale Agenzie Energetiche Locali | In Italian | → Energy economics |
| RENAISSANCE | Renewable ENergy Acting in SuStainable And Novel Community Enterprises | In English | → Energy economics |
| RENATER | Réseau National de Télécommunication pour la Technologie, l'Enseignement et la Recherche | In French | → Research policy → Networks, communication → Education |
| ReNEv | Research in Nondestructive Evaluation | In English | → Serial publications, periodicals |
| REOM | Redevance sur Enlèvement des Ordures Ménagères | In French | → Taxes, duties → Environmental technology, water supply, waste management |
| REP | Réacteur à Eau Pressurisée = PWR, DWR (look above) |
In French | → Nuclear technology |
| RER | Réseau Express Régional | In French | → Rail transport engineering → Transport and postal services |
| RESC | Réacteur à Eau SuperCritique | In French | → Nuclear technology |
| ReSMA | Reparto Sperimentazioni di Meteorologia Aeronautica | In Italian | → Meteorology, climatology → Aeronautics, aircraft |
| RESTART | Renewable Energy Strategies and Technology Applications for Regenerating Towns | In English | → Energy economics |
| RET | Régie d'Electricité de Thônes | In French | → Electrical engineering |
| RET | Rotterdamse Electrische Tram | In Dutch | → Rail transport engineering → Transport and postal services → Netherlands |
| RETS | Reconfigurable Electrical Test Stand | In English | → Electrical engineering |
| REU | Remote Electronics Unit | In English | → Electronics |
| REUS | Rational Energy Use & Solutions | In English | → Energy economics |
| REVS | Requirements Engineering and Validation System | In English | |
| RFECP | Request For Engineering Change Proposal | In English | |
| RFEI | Request For Engineering Information | In English | |
| RFHA | Reusable Flight Hardware Authorization | In English | → Computer hardware → Aeronautics, aircraft → Astronautics |
| RFI | Rete Ferroviaria Italiana | In Italian | → Rail transport engineering → Transport and postal services → Italia |
| RFI | Radio Frequency Interference | In English | → Telecommunications → Electronics |
| RFrM | Revue Francaise de Mécanique | In French | → Serial publications, periodicals → Mechanical engineering → France |
| RFS | Règle Fondamentale de Sûreté | In French | → Nuclear technology |
| RFT | Rat für Forschung und Technologie | In German | → Organizations and associations → Research policy |
| RFT | Rat für Forschung und Technologieentwicklung (https://www.rat-fte.at/) | In German | → Organizations and associations → Research policy → Austria |
| RFVL | Rotonde Ferroviaire de la Vallée du Loir | In French | → Rail transport engineering → Rail transport |
| RGC | Rénovation Générale de Cuves | In French | → Mechanical engineering |
| RGC&U | Réseau Génie Civil et Urbain | In French | → Civil engineering → Construction |
| RGN | Revue Générale Nucléaire | In French | → Serial publications, periodicals → Nuclear, atomic, and molecular physics → Nuclear technology |
| RHS | Rocketdyne Hybrid Simulator | In English | → Astronautics |
| RIAM | Research Institute for Applied Mechanics | In English | → Research institutes → Mechanics → Mechanical engineering |
| RIAPS | Remote Infrared Atmospheric Profiling System | In English | → Meteorology, climatology → Astronautics |
| RIC | Resistance, Inductance, and Capacitance | In English | → Physics → Electrical engineering |
| RIDITT | Rete Italiana per la Diffusione dell'Innovazione e il Trasferimento Tecnologico alle Imprese | In Italian | → Research policy → Italia |
| RIE | Reactive Ion Etching | In English | |
| RIG | Remote Imaging Group (www.rig.org.uk) | In English | → Organizations and associations → Astronautics |
| RIIC | Research Institute for Integrated Circuits | In English | → Research institutes → Electronics |
| RILEM | Réunion Internationale des Laboratoires pour l'Essai des Matériaux | In French | → Organizations and associations → Research institutes → Materials science |
| RIMSS | Rockwell International Modular Satellite System | In English | → Astronautics |
| RIN | Royal Institute of Navigation | In English | → Geodesy, cartography → Vehicle engineering → Transport and postal services |