| PNB | Parti Nationaliste Basque (www.eaj-pnb.eu) | In French | → Political parties and movements |
| PNB | Pôle Nucléaire Bourguignon | In French | → Nuclear technology |
| PNC | Parti de la Nation Corse | In French | → Political parties and movements |
| PNC | Personnel Navigant Commercial | In French | → Transport and postal services |
| PNCA | Programme National de la Chimie Atmosphérique | In French | → Chemistry → Meteorology, climatology |
| PNDA | Plan National de Développement Agricole | In French | → Agricultural sciences |
| PNEAT | Programme National Efflorescences Alguales Toxiques | In French | → Earth sciences → Biological sciences |
| PNEDC | Programme National d'Étude du Climat | In French | → Meteorology, climatology |
| PNEM | Programme National d'Écotoxicologie Marine | In French | → Marine research, oceanography → Biological sciences |
| PNH | Primate Non Humain | In French | → Zoology → Pharmacology, toxicology |
| PNL | Programmation Neuro-Linguistique | In French | → Psychology |
| PNNS | Programme National Nutrition Santé | In French | → Nutrition → Public health and hygiene |
| PNO | Parti Nationaliste Occitan | In French | → Political parties and movements |
| PNOC | Programme National d'Océanographie Côtière | In French | → Marine research, oceanography |
| PNR | Parc Naturel Régional | In French | → Nature |
| PNRC | Programme National de Recherche sur les Maladies Cardiovasculaires | In French | → Cardiology |
| PNRD | Programme National de Recherche sur le Diabète | In French | → Physiology → Pathology |
| PNTPM | Physique Nucléaire Théorique et Physique Mathématique | In French | → Mathematics → Physics → Nuclear, atomic, and molecular physics |
| PNUD | Programme des Nations Unies pour le Développement = PNUD | Programa de les Naciones Uníes pa'l Desendolcu | In Asturian = PNUD | Programul Naţiunilor Unite pentru Dezvoltare | In Romanian = PUND | Programo de la Unuiĝintaj Nacioj pri Disvolvado | In Esperanto = UNDP | United Nations Development Programme | In English = PNUD | Programa de las Naciones Unidas para el Desarrollo | In Spanish = PNUD | Programa de les Nacions Unides per al Desenvolupament | In Catalan = UNDP | გაეროს განვითარების პროგრამა | In Georgian = UNDP | জাতিসংঘ উন্নয়ন কর্মসূচী | In Bengali = PNUD | Programa das Nações Unidas para o Desenvolvimento | In Portuguese = ПРООН | Программа развития ООН | In Russian = UNDP | สำนักงานโครงการพัฒนาแห่งสหประชาชาติ | In Thai = UNDP | ஐக்கிய நாடுகள் வளர்ச்சித் திட்டம் | In Tamil = UNDP | 联合国开发计划署 | In Chinese |
In French | → International relations → Development → United Nations |
| PNUE | Programme des Nations Unies pour l'Environnement | In French | → United Nations |
| PoA | Politique Africaine | In French | → Serial publications, periodicals → Politics |
| POBeo | Publications de l'Observatoire Astronomique de Beograd | In French | → Serial publications, periodicals → Astronomy |
| POBor | Publications de l'Observatoire de l'Université de Bordeaux | In French | → Serial publications, periodicals → Astronomy |
| POI | Plan d'Opération Interne | In French | |
| POLDEN | Pollution, Déchets, Environnement | In French | → Nature → Environmental technology, water supply, waste management |
| POPar | Publication de l'Observatoire de Paris | In French | → Serial publications, periodicals → Astronomy |
| POS | Plan d'Occupation des Sols | In French | → Regional planning |
| POSL | Parti Ouvrier Socialiste Luxembourgeois = LSAP | Lëtzebuerger Sozialistesch Aarbechterpartei | In Letzeburgesh = LSAP | Luxemburger Sozialistische Arbeiterpartei | In German = LSAP | Luxemburgse Socialistische Arbeiderspartij | In Dutch |
In French | → Political parties and movements |
| POST | Plan d'Orientation Scientifique et Technique | In French | → Research policy → Mathematics and natural sciences → Applied sciences, technology |
| POStr | Publication de l'Observatoire de Strasbourg | In French | → Serial publications, periodicals → Astronomy |
| POTou | Publications de l'Observatoire de Toulouse | In French | → Serial publications, periodicals → Astronomy |
| PP | Préfecture de Police | In French | → Police |
| PPA | Plan de Protection de l'Atmosphère | In French | → Nature → Meteorology, climatology |
| PPCM | Plus Petit Commun Multiple | In French | → Number theory |
| PPF | Parti Populaire Français | In French | → Political parties and movements → History |
| PPI | Plan Particulier d'Intervention | In French | |
| PPMR | Préparation Physique, Mentale et Réathlétisation | In French | → Sport, physical exercises |
| PPP | Partenariat Public-Privé = PPP | Public Private Partnership | In English |
In French | → Law, jurisprudence → Public administration, government |
| PPR | Plan de Prévention des Risques | In French | |
| PPR | Panphotocoagulation rétinienne | In French | → Ophtalmology |
| PPRA | Pôle Productique Rhône-Alpes | In French | → Engineering, technology |
| PPRE | Programme personnalisé de Réussite Éducative | In French | → Education |
| PQ | Parti Québécois | In French | → Political parties and movements |
| PQJ | Police aux Questions Juives | In French | → Police |
| PQR | Presse Quotidienne Régionale | In French | → Newspapers, journalism |
| PRAI | Programme Régional d’Actions Innovatrices | In French | → Regional administration → Engineering, technology |
| PRAMED | Programme Régional pour l'Air, la Maîtrise de l'Énergie et les Déchets | In French | |
| PRCC | Programme de Renforcement des Capacités Commerciales | In French | → Trade → Development |
| PRCF | Pôle de Renaissance Communiste en France | In French | → Political parties and movements |
| PRCTE | Programme Régional de la Création et de la Transmission d'Entreprises | In French | → Economic policy |
| PRDF | Présentation et de Rapprochement des Données Financières = FDSR | Financial Data Submission and Reconciliation | In English |
In French | → Finance |
| PRDFP | Plan Régional de Développement des Formations Professionnelles des jeunes et des adultes | In French | → Labour, labour economics → Education |
| PRDT | Prestation Régionale de Développement Technologique | In French | → Engineering, technology |
| PRE | Police Régionale d'Etat | In French | → Police |
| PREDIS | Plan Régional d'Élimination des Déchets Industriels Spéciaux | In French | → Nature → Environmental technology, water supply, waste management |
| PREDIT | Programme National de Recherche et d'Innovation dans les Transports Terrestres | In French | → Vehicle engineering → Transport and postal services |
| PRES | Pôle de Recherche et d'Enseignement Supérieur | In French | → Research policy → Specialized or (poly)technical colleges → Higher education, universities |
| PRES | Pôles de Recherche et d'Enseignement Supérieur | In French | → Research policy → Specialized or (poly)technical colleges → Higher education, universities |
| PRF | Projet de Recherches Fédérateur | In French | → Research policy |
| PRG | Parti Radical de Gauche | In French | → Political parties and movements |
| PRI | Programme de Recherches Interdisciplinaires | In French | → Research policy |
| PRI | Point de Raccordement Immeuble | In French | → Telecommunications |
| PRIC | Points Relais Information Conseil | In French | |
| PRIM | Prévention des RIsques Majeurs | In French | |
| PRIMEQUAL | Programme de Recherche Interorganismes pour une Meilleure Qualité de l'Air à l'échelle Locale | In French | → Environment, environmental sciences → Meteorology, climatology |
| PRISMA | Productique et Informatique des Systèmes Manufacturiers | In French | → Computer-based techniques → Mechanical engineering |
| PRISME | PRoduits d'Information Spécialisée et Médiation Électronique | In French | → Knowledge management |
| PRITI | Pays à Revenu Intermédiaire Tranche Inférieure | In French | → Geography → Development |
| PROLOG | PROgrammation LOGique | In French | → Programming languages |
| PROMU | Prospective de la Mobilité dans les Métropoles | In French | → Transport and postal services → Regional planning |
| PrPc | Protéine prion cellulaire | In French | → Infectious diseases |
| PRPV | Programme Régional de Protection des Végétaux | In French | |
| PRQA | Plan Régional de la Qualité de l'Air | In French | → Nature → Meteorology, climatology |
| PRS | (Syndicat National des) Papetiers Répartiteurs Spécialisés | In French | → Organizations and associations → Graphic industries, printing, publishing → Paper and board industry |
| PRST | Pôle de Recherche Scientifique et Technologique | In French | → Organizations and associations → Research policy → Engineering, technology |
| PS | Parti Socialiste | In French | → Political parties and movements |
| PSCDS | Publication Spéciale du Centre de Données Stellaires | In French | → Serial publications, periodicals → Astronomy |
| PSE | Parti Socialiste Européen = PES | Party of European Socialists | In English = PES | Partia Europejskich Socjalistów | In Polish = ESP | Europeiska socialdemokratiska partiet | In Swedish = PSE | Partito del Socialismo Europeo | In Italian |
In French | → Political parties and movements |
| PSEM | Pays du Sud et de l'Est de la Méditerranée | In French | → Geography |
| PSEPR | Pôle Système Électrique Production Régionale | In French | → Electrical engineering |
| PSF | Parti Social Français | In French | → Political parties and movements |
| PSL | Produit Sanguin Labile | In French | → Pharmacology, toxicology |
| PSN | Plan Stratégique National | In French | → Central administration |
| PSPA | Pilotage des Systèmes de Production Automatisée | In French | → Mechanical engineering |
| PSPH | Participant au Service Public Hospitalier | In French | → Medicine |
| PSS | Procédé de Stabilisation et Solidification | In French | → Environmental technology, water supply, waste management |
| PSSA | Programme Spécial pour la Sécurité Alimentaire = SPFS | Special Programme for Food Security | In English |
In French | → Agricultural sciences → Food technology |
| PT | Parti des Travailleurs | In French | → Political parties and movements |
| PTA | Professeur Technique Adjoint | In French | → Specialized or (poly)technical colleges |
| PTAE | Professeur Technique Adjoint d'Enseignement | In French | → Specialized or (poly)technical colleges |
| PTI | Purpura Thrombopénique Idiopathique | In French | → Pathology |
| PTR | Prestation Technologique Réseau | In French | → Engineering, technology |
| PTS | Police Technique et Scientifique | In French | → Police |
| PTT | Purpura Thrombotique Thrombocytopénique | In French | → Blood and circulatory system → Pathology |
| PTZ | Prêt à Taux Zéro | In French | → Finance |
| PUCA | Plan Urbanisme, Construction, Architecture | In French | → Building → Architecture |
| PUCE | Programme pour l'Utilisation des Composants Électroniques | In French | → 621038 |
| PUL | Pôle Universitaire Lyonnais | In French | → Higher education, universities |
| PUMA | Programme pour l'Utilisation des Matériaux Avancés | In French | → Engineering, technology |
| PUMSUD | Pour Un Mouvement Syndical Uni et Démocratique | In French | → Organizations and associations → Labour, labour economics |
| PUR | Parti de l'Union Radicale | In French | → Political parties and movements |
| PV | Polyglobulie de Vaquez | In French | → Blood and circulatory system → Pathology |
| PVA | Plasma Viro-Atténué | In French | → Blood and circulatory system |
| PVD | Pays en Voie de Développement = PVS | Paesi in via di sviluppo | In Italian |
In French | → Development → Geography |
| Q | Glutamine = Q | Glutamine | In English = Q | Glutamina | In Catalan = Q | Glutamin | In Czech = Q | Glutamin | In German = Q | Glutamina | In Spanish = Q | Glutamino | In Esperanto = Q | 글루타민 | In Korean = Q | Glutamin | In Indonesian = Q | Glutammina | In Italian = Q | גלוטמין | In Hebrew = Q | Glutamīns | In Latvian = Q | Glutamin | In Letzeburgesh = Q | Glutaminas | In Lithuanian = Q | Glutamine | In Dutch = Q | グルタミン | In Japanese = Q | Glutamina | In Polish = Q | Glutamina | In Portuguese = Q | Глутамин | In Russian = Q | Glutamín | In Slovak = Q | Глутамин | In Serbian = Q | Glutamiini | In Finnish = Q | Glutamin | In Swedish = Q | Glutamin | In Turkish = Q | Глутамін | In Ukrainian = Q | 穀氨醯胺 | In Chinese |
In French | → Biochemistry, biophysics |
| QI | Quotient Intellectuel | In French | |
| QI | Qualification Initiale | In French | → Quality management |
| QO | Qualification Opérationnelle | In French | → Quality management |
| QP | Qualification des Performances | In French | → Quality management |
| QSE | Qualité, Sécurité, Environnement | In French | → Quality management |
| R | Arginine = R | Arginine | In English = R | Arginina | In Catalan = R | Arginin | In Czech = R | Arginin | In German = R | Arginina | In Spanish = R | Arginino | In Esperanto = R | 아르기닌 | In Korean = R | Arginin | In Croatian = R | Arginin | In Indonesian = R | Arginina | In Italian = R | ארגינין | In Hebrew = R | Arginīns | In Latvian = R | Arginin | In Letzeburgesh = R | Argininas | In Lithuanian = R | Arginine | In Dutch = R | アルギニン | In Japanese = R | آرګېنين | In Pashto = R | Arginina | In Polish = R | Arginina | In Portuguese = R | Аргинин | In Russian = R | Arginín | In Slovak = R | Arginiini | In Finnish = R | Arginin | In Swedish = R | Arginin | In Turkish = R | Аргінін | In Ukrainian = R | 精氨酸 | In Chinese |
In French | → Biochemistry, biophysics |
| 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 → Engineering, technology |
| R2I | Réseau Industriel d'Innovation | In French | → Research policy → Industry, industrial policy → Engineering, technology |
| R2ITH | Réseau Industriel d'Innovation du Textile et de l'Habillement | In French | → Textile industry |
| R@S | Réseau Associatif et Syndical | In French | → Networks, communication |
| RA | Revue d'Assyriologie et d'archéologie orientale | In French | → Serial publications, periodicals → Archeology → History |
| RAADIS | Réseau pour une Agriculture et une Alimentation Durables Inventives et Solidaires | In French | → Organizations and associations → Agricultural sciences → Food technology |
| RACC | Racing Athlétic Club Cheminots | In French | → Organizations and associations → Sport, physical exercises |
| RADAR | Résultats, Approche, Déploiement, Appréciation, Revue | In French | → Quality management |
| RAéS | Réseau Recherche Aéronautique sur le Supersonique | In French | → Aeronautics, aircraft |
| RAG | Réseau d’Alimentation Générale | In French | → Electrical engineering |
| RAI | Rencontre Assyriologique Internationale | In French | → Archeology |
| RAI | Mouvement des Jeunes Socialistes | In French | → Political parties and movements |
| RAMC | Régime Canadien d'Accès aux Médicaments = CAMR | Canada's Access to Medicines Regime | In English |
In French | → Pharmacology, toxicology |
| RAP | Reconnaissance Automatique de la Parole = ASR | Automatic Speech Recognition | In English |
In French | → Computer-based techniques → Linguistics |
| RAPACE | Répertoire Automatisé Pour l’Analyse des Contrefaçons de l’Euro | In French | → Police |
| RAQ | Responsable Assurance Qualité | In French | → Quality management |
| RARE | Réseau de recherche et d'innovation technologique 'Alimentation Référence Europe' | In French | → Nutrition → Food technology |
| RATP | Régie Autonome des Transports Parisiens | In French | → Transport and postal services |
| RAVeL | Réseau Autonome des Voies Lentes | In French | → Transport and postal services |
| RAVIOLI | RAdar Vision Orienté LIdar | In French | |
| RB | Revue Biblique | In French | → Serial publications, periodicals → Christianity |
| RCA | Rugby Club Auxerrois | In French | → Organizations and associations → Football and rugby |
| RCACP | Rugby Club Agglomération Cergy Pontoise | In French | → Organizations and associations → Football and rugby |
| RCAV | Rugby Club Aubenas Vals | In French | → Organizations and associations → Football and rugby |
| RCB | Réseau Complémentaire de Bassin | In French | → Hydrology |
| RCC | Rugby Club Châteaurenard | In French | → Organizations and associations → Football and rugby |
| RCD | Rugby Club Dijonnais | In French | → Organizations and associations → Football and rugby |
| RCD | Réacteur Complétement Déchargé | In French | → Nuclear technology |
| RCEA | Revue Canadienne des Études Africaines | In French | → Language, linguistics, literature → Geography, biography, history |
| RCF | Radios Chrétiennes en France | In French | → Organizations and associations → Telecommunications → Christianity |
| RCF | Rassemblement des Contribuables Français | In French | → Political parties and movements |
| RCFI | Rugby Club de Flandre Intérieure | In French | → Organizations and associations → Football and rugby |
| RCGC | Rugby Club Grand-Couronnais | In French | → Organizations and associations → Football and rugby |
| RCGM | Rugby Club Grande Motte | In French | → Organizations and associations → Football and rugby |
| RCM | Rugby Club de Montréal | In French | → Organizations and associations → Football and rugby |
| RCMD | Rugby Club Municipal Déolois | In French | → Organizations and associations → Football and rugby |
| RCNM | Racing Club Narbonne Méditerranée | In French | → Organizations and associations → Football and rugby |
| RCO | Rencontres Chimiques de l’Ouest | In French | → Specialized or (poly)technical colleges → Chemistry → Chemical technology |
| RCO | Radio Comptoir de l'Ouest (www.rco.fr) | In French | → Telecommunications → Electronics |
| RCO | Rugby Club Orléans (www.rcorleans.com) | In French | → Organizations and associations → Football and rugby |
| RCP | Rugby Club de Plabennec | In French | → Organizations and associations → Football and rugby |
| RCP | Résumé des Caractéristiques du Produit = SPC | Summary of Product Characteristics | In English |
In French | → Pharmacology, toxicology |
| RCP | Réanimation cardiopulmonaire | In French | → Traumatology |
| RCP | Rémunération pour Copie Privée | In French | → Software → Cinema, movies |
| RCPGs | Récepteurs Couplés aux Protéines-G | In French | → Biochemistry, biophysics |
| RCS | Registre du Commerce et des Sociétés | In French | → Economic policy → Trade |
| RCS | Racing Club de Strasbourg | In French | → Organizations and associations → Sport, physical exercises |
| RCS | Revision Control System | In French | → Software |
| RCSO-TIC | Réseau de Compétences de Suisse Occidentale en Technologie de l'Information et de la Communication | In French | → Computer science → Telecommunications |
| RCVMT | Rugby Club Vif Monestier Trièves | In French | → Organizations and associations → Football and rugby |
| RD | Rétinopathie Diabétique | In French | → Pathology → Ophtalmology |
| RD | Rassemblement Démocrate | In French | → Political parties and movements |
| RDA | Rassemblement Démocratique Africain | In French | → Political parties and movements |
| RDA | République Démocratique Allemande = GDR | Germana Demokratia Respubliko | In Esperanto = RDA | Republik Demokratel Alamagn | In Breton = RDA | República Democrática Alemana | In Spanish = DDR | Deutsche Demokratische Republik | In German = DDR | Duitse Demokratiese Republiek | In Afrikaans = NDR | Njemačka Demokratska Republika | In Bosnian = RDA | República Democràtica Alemanya | In Catalan = NDR | Německá demokratická republika | In Czech = ГДР | Германи Демократиллĕ Республики | In Chuvash = ΛΔΓ | Λαϊκή Δημοκρατία της Γερμανίας | In Greek = GDR | German Democratic Republic | In English = AED | Alemaniar Errepublika Demokratikoa | In Basque = NDK | Német Demokratikus Köztársaság | In Hungarian = RDT | Repubblica Democratica Tedesca | In Italian = DDR | Duitse Democratische Republiek | In Dutch = RDG | Republica Democrată Germană | In Romanian = DAC | Demokratik Alman Cumhuriyeti | In Turkish |
In French | → Geography |
| RDC | République Démocratique du Congo | In French | → Geography |
| RDR | Règlement de Développement Rural | In French | → Agricultural sciences → Regional planning |
| RDT | Réseau de Développement Technologique | In French | → Engineering, technology |
| RDTC | Réseau de Développement Technologique Corse | In French | → Engineering, technology |
| RE | Revue d'Égyptologie | In French | → Serial publications, periodicals → Archeology |
| REB | Réacteur à Eau Bouillante = BWR | Boiling Water Reactor | In English = SWR | Siedewasserreaktor | In German |
In French | → Nuclear technology |
| RecAug | Recherches Augustiniennes | In French | → Serial publications, periodicals → Religion, theology |
| RECIFE | REcherche sur la Capacité des Infrastructures FErroviaires | In French | → Rail transport engineering → Transport and postal services |
| RECITS | Recueil des Eléments de Connaissances Interdisciplinaires sur les Transports et leur Sécurité | In French | → Transport and postal services |
| RecSR | Recherches de Sciences Religieuses | In French | → Serial publications, periodicals → Religion, theology |
| REFIDI | Résidus d'Épuration des Fumées d'Incinérateur de Déchets Industriels | In French | → Environmental technology, water supply, waste management |
| REFIOM | Résidus d'Épuration des Fumées d'Incinérateur d'Ordures Ménagères | In French | |
| REFIOM | Résidu de Fumée d'Incinération d'Ordures Ménagères | In French | → Environmental technology, water supply, waste management |
| REG | Résistances Électriques et Gazières | In French | → Electrical engineering |
| REG | Régie des Eaux de Grenoble | In French | → Environmental technology, water supply, waste management |
| REG | Revue des Études Grecques | In French | → Serial publications, periodicals → Language, linguistics, literature |
| REI | Revue des Études Islamiques | In French | → Serial publications, periodicals → Islam |
| REJ | Revue des Études Juives | In French | → Serial publications, periodicals → Judaism |
| REL | Revue des Études Latines | In French | → Serial publications, periodicals → Language, linguistics, literature |
| REMMM | Revue des Mondes Musulmans et de la Méditerranée | In French | → Serial publications, periodicals → Area studies |
| REMMM | Revue du Monde Musulman et de la Méditerranée | In French | → Serial publications, periodicals → Area studies |
| RéNaSS | Réseau National du Surveillance Sismique | In French | |
| RENATER | Réseau National de Télécommunication pour la Technologie, l'Enseignement et la Recherche | In French | → Research policy → Networks, communication → Education → Engineering, technology |
| REP | Réacteur à Eau Pressurisée = PWR | Pressurized Water Reactor | In English = DWR | Druckwasserreaktor | In German |
In French | → Nuclear technology |
| REPOM | Réseau national de surveillance des ports maritimes | In French | → Transport and postal services |
| RER | Réseau Europe Régions | In French | → Research policy → Regional administration |
| RERS | Réseau d'Échanges Réciproques de Savoirs | In French | → Science and knowledge → Organizations and associations |
| RES | Revue des Études Sémitiques | In French | → Serial publications, periodicals → Judaism |
| RESC | Réacteur à Eau SuperCritique | In French | → Nuclear technology |
| RESF | Réseau Éducation Sans Frontières | In French | → Organizations and associations → Education |
| ReSo | Réformistes et Solidaires | In French | → Political parties and movements |
| RESPECT | Route Empruntée en Sécurité par le Piéton Enfant Confronté au Trafic | In French | → Transport and postal services |
| RÉSR | Regroupement des Étudiants en Sciences des Religions | In French | → Organizations and associations → Religion, theology → Higher education, universities |
| RESSAC | Recherches en radioécologie sur des Écosystèmes Soumis à des Situations Accidentelles Contrôlées | In French | → Nature |
| RET | Résistance Évaporative Thermique | In French | → Textile industry |