Pure sciences and exact or mathematical sciences, including astronomy, mechanics and mathematical physics.
| Acronym | Sense | Language | Topics | 
|---|---|---|---|
| Rb | Rubidium = Rb | Rubidium | In French = Rb | Rubidium | In Afrikaans = Rb | روبيديوم | In Arabic = Rb | Рубідый | In Belarusian = Rb | Рубидий | In Bulgarian = Rb | রুবিডিয়াম | In Bengali = Rb | Rubidijum | In Bosnian = Rb | Rubidi | In Catalan = Rb | Rubidiu | In Corsican = Rb | Rubidium | In Czech = Rb | Rwbidiwm | In Welsh = Rb | Rubidium | In Danish = Rb | Rubidium | In German = Rb | Ρουβίδιο | In Greek = Rb | Rubidium | In English = Rb | Rubidio | In Esperanto = Rb | Rubidio | In Spanish = Rb | Rubiidium | In Estonian = Rb | Rubidio | In Basque = Rb | روبیدیوم | In Persian = Rb | Rubidium | In Finnish = Rb | Rubidi | In Friulian = Rb | Rúbaidiam | In Irish = Rb | Rubidio | In Galician = Rb | Rubiddjum | In Manx = Rb | רובידיום | In Hebrew = Rb | रुबिडियम | In Hindi = Rb | Rubidij | In Croatian = Rb | Rubídium | In Hungarian = Rb | Ռուբիդիում | In Armenian = Rb | Rubidium | In Indonesian = Rb | Rubidio | In Ido = Rb | Rúbidín | In Icelandic = Rb | Rubidio | In Italian = Rb | ルビジウム | In Japanese = Rb | xunsodna | In Lojban = Rb | Rubidium | JV = Rb | ರುಬಿಡಿಯಮ್ | In Kannada = Rb | 루비듐 | In Korean = Rb | Rûbîdyûm | In Kurdish = Rb | Rubidium | In Latin = Rb | Rubidium | In Letzeburgesh = Rb | Rubidis | In Lithuanian = Rb | Rubīdijs | In Latvian = Rb | റൂബിഡിയം | In Malayalam = Rb | Rubidium | In Dutch = Rb | Rubidium | In Nynorsk = Rb | Rubidium | In Norwegian = Rb | Rubidi | In Occitan = Rb | Rubid | In Polish = Rb | Rubídio | In Portuguese = Rb | Rubidyu | In Quechua = Rb | Rubidiu | In Romanian = Rb | Рубидий | In Russian = Rb | Rubidiu | In Sicilian = Rb | Rubidijum | In Serbo-Croatian = Rb | Rubídium | In Slovak = Rb | Rubidij | In Slovenian = Rb | Рубидијум | In Serbian = Rb | Rubidi | In Swahili = Rb | ருபீடியம் | In Tamil = Rb | รูบิเดียม | In Thai = Rb | Rubidyum | In Turkish = Rb | Рубідій | In Ukrainian = Rb | Rubidiy | In Uzbek = Rb | Rubidi | In Vietnamese = Rb | Rubidiom | In Walloon = Rb | 铷 | In Chinese  | 
In Swedish | → Chemistry | 
| Rb | Rubidi = (look above)  | 
In Swahili | → Chemistry | 
| Rb | ருபீடியம் = (look above)  | 
In Tamil | → Chemistry | 
| Rb | รูบิเดียม = (look above)  | 
In Thai | → Chemistry | 
| Rb | Rubidyum = (look above)  | 
In Turkish | → Chemistry | 
| Rb | Рубідій = (look above)  | 
In Ukrainian | → Chemistry | 
| Rb | Rubidiy = (look above)  | 
In Uzbek | → Chemistry | 
| Rb | Rubidi = (look above)  | 
In Vietnamese | → Chemistry | 
| Rb | Rubidiom = (look above)  | 
In Walloon | → Chemistry | 
| Rb | 铷 = (look above)  | 
In Chinese | → Chemistry | 
| RBE | Radiation Biological Effectiveness | In English | → Biological sciences | 
| RBrFi | Revista Brasileira de Física | In Portuguese | → Serial publications, periodicals → Physics → Brazil  | 
| RCB | Réseau Complémentaire de Bassin | In French | → Hydrology | 
| RCO | Rencontres de Chimie Organique | In French | → Congresses → Organic chemistry  | 
| RCO | Rencontres Chimiques de l'Ouest | In French | → Congresses → Chemistry  | 
| RCP | Right Circular Polarizer | In English | → Optics | 
| RCP | Reação em Cadeia da Polimerase = PCR | Polymerase Chain Reaction | In English = ACP | Amplification en Chaîne par Polymérase | In French = TAN | Test d'amplification des Acides Nucléiques | In French = ПЦР | Полимера́зная Цепна́я Реа́кция | In Russian = PĈR | Polimeraza Ĉen-Reakcio | In Esperanto = PZR | Polimeraz Zəncir Reaksiyası | In Azerbaijani = ՊՇՌ | Պոլիմերազային շղթայական ռեակցիան | In Armenian = PGR | Polimerazinė Grandininė Reakcija | In Lithuanian = ПГУ | Полимеразын Гинжин Урвал | In Mongolian = ПЛР | Полімеразна Ланцюгова Реакція | In Ukrainian  | 
In Portuguese | → Biotechnology → Genetics → Enzymes  | 
| RCPGs | Récepteurs Couplés aux Protéines-G | In French | → Proteins | 
| RDCMP | Recent Development in Condensed Matter Physics | In English | → Serial publications, periodicals → Physics of condensed matter  | 
| RDM | Repeats Detection Method | In English | → Algorithms → Computer-based techniques → Biotechnology  | 
| REB | Radiation and Environmental Biophysics | In English | → Serial publications, periodicals → Threats to the environment → Biochemistry, biophysics  | 
| REC | Regional Environmental Center for Central and Eastern Europe | In English | → Threats to the environment | 
| RECONS | Research Consortium on Nearby Stars | In English | → Astronomy | 
| RECOVER | Research on Coping with Vulnerability to Environmental Risk | In English | → Environmental protection → Threats to the environment  | 
| RedCYT | Red Científica y Tecnológica | In Spanish | → Computer science → Applied sciences, technology → Telecommunications  | 
| RefERE | Réseau francophone international de recherche en Éducation Relative à l'Environnement (www.refere.uqam.ca) | In French | → Organizations and associations → Education → Threats to the environment  | 
| REM | Rapid Eye Movement | In English | → Biological sciences | 
| REM | Roentgen Equivalent Man | In English | → Radioactivity → Medicine  | 
| REN-ISAC | Research and Education Networking Information Sharing and Analysis Centre | In English | → Education | 
| RéNaSS | Réseau National du Surveillance Sismique (http://renass.u-strasbg.fr) | In French | → Organizations and associations → Seismology, earthquakes → France  | 
| REOSC | Recherches et Études d'Optique et de Sciences Connexes | In French | → Optics | 
| RERE | Ressources en Eau Renouvelables Externes | In French | → Hydrology | 
| RERI | Ressources en Eau Renouvelables Internes | In French | → Hydrology | 
| RERR | Ressources en Eau Renouvelables Réelles | In French | → Hydrology | 
| RERT | Ressources en Eau Renouvelables Totales | In French | → Hydrology | 
| RES | Reticuloendothelial system | In English | → Cytology | 
| ReSMA | Reparto Sperimentazioni di Meteorologia Aeronautica | In Italian | → Meteorology, climatology → Aeronautics, aircraft  | 
| RESSAC | Recherches en radioécologie sur des Écosystèmes Soumis à des Situations Accidentelles Contrôlées | In French | → Environmental protection | 
| REVIVAL | Retrofitting for Environmental Viability Improvement of Valued Architectural Landmarks | In English | → Threats to the environment → Regional planning → Architecture  | 
| RFLP | Restriction Fragment Length Polymorphism | In English | → Genetics → Biotechnology  | 
| RGF | Rudarsko Geološki Fakultet | In Serbian | → Earth sciences | 
| RGII | Regional Greenhouse Gas Initiative | In English | → 5023 → Meteorology, climatology  | 
| RGN | Revue Générale Nucléaire | In French | → Serial publications, periodicals → Nuclear, atomic, and molecular physics → Nuclear technology  | 
| RGOB | Royal Greenwich Observatory Bulletin | In English | → Serial publications, periodicals → Astronomy  | 
| RGOO | Royal Greenwich Observatory Observations | In English | → Serial publications, periodicals → Astronomy  | 
| Rh | Rhodium = Rh | Rodium | In Afrikaans = Rh | روديوم | In Arabic = Rh | রোহডিয়াম | In Bengali = Rh | Родый | In Belarusian = Rh | Rodijum | In Bosnian = Rh | Rodi | In Catalan = Rh | Rhodium | In Czech = Rh | Rodiu | In Corsican = Rh | Rhodiwm | In Welsh = Rh | Rhodium | In Danish = Rh | Rhodium | In German = Rh | Roodium | In Estonian = Rh | Ρόδιο | In Greek = Rh | Rodio | In Spanish = Rh | Rodio | In Esperanto = Rh | Rodio | In Basque = Rh | رادیم | In Persian = Rh | Rhodium | In French = Rh | Rodi | In Friulian = Rh | Roydjum | In Manx = Rh | Rodio | In Galician = Rh | 로듐 | In Korean = Rh | Ռոդիում | In Armenian = Rh | Rodij | In Croatian = Rh | Rodio | In Ido = Rh | Rodium | In Indonesian = Rh | Ródín | In Icelandic = Rh | Rodio | In Italian = Rh | רודיום | In Hebrew = Rh | Rodium | JV = Rh | Rodi | In Swahili = Rh | Rodyòm | In Haitian Creole = Rh | Rodyûm | In Kurdish = Rh | Rhodium | In Latin = Rh | Rodijs | In Latvian = Rh | Rhodium | In Letzeburgesh = Rh | Rodis | In Lithuanian = Rh | zgujinme | In Lojban = Rh | Ródium | In Hungarian = Rh | റോഡിയം | In Malayalam = Rh | र्होडियम | In Marathi = Rh | Rhodium | In Dutch = Rh | ロジウム | In Japanese = Rh | Rhodium | In Norwegian = Rh | Rhodium | In Nynorsk = Rh | Ròdi | In Occitan = Rh | Rodiy | In Uzbek = Rh | Rod | In Polish = Rh | Ródio | In Portuguese = Rh | Rodiu | In Romanian = Rh | Родий | In Russian = Rh | Rodiu | In Sicilian = Rh | Ródium | In Slovak = Rh | Rodij | In Slovenian = Rh | Родијум | In Serbian = Rh | Rodijum | In Serbo-Croatian = Rh | Rodium | In Finnish = Rh | Rodium | In Swedish = Rh | ரோடியம் | In Tamil = Rh | โรเดียม | In Thai = Rh | Rhodi | In Vietnamese = Rh | Rodyum | In Turkish = Rh | Родій | In Ukrainian = Rh | 铑 | In Chinese  | 
In English | → Chemistry | 
| Rh | Rodium = (look above)  | 
In Afrikaans | → Chemistry | 
| Rh | روديوم = (look above)  | 
In Arabic | → Chemistry | 
| Rh | রোহডিয়াম = (look above)  | 
In Bengali | → Chemistry | 
| Rh | Родый = (look above)  | 
In Belarusian | → Chemistry | 
| Rh | Rodijum = (look above)  | 
In Bosnian | → Chemistry | 
| Rh | Rodi = (look above)  | 
In Catalan | → Chemistry | 
| Rh | Rhodium = (look above)  | 
In Czech | → Chemistry | 
| Rh | Rodiu = (look above)  | 
In Corsican | → Chemistry | 
| Rh | Rhodiwm = (look above)  | 
In Welsh | → Chemistry | 
| Rh | Rhodium = (look above)  | 
In Danish | → Chemistry | 
| Rh | Rhodium = (look above)  | 
In German | → Chemistry | 
| Rh | Roodium = (look above)  | 
In Estonian | → Chemistry | 
| Rh | Ρόδιο = (look above)  | 
In Greek | → Chemistry | 
| Rh | Rodio = (look above)  | 
In Spanish | → Chemistry | 
| Rh | Rodio = (look above)  | 
In Esperanto | → Chemistry | 
| Rh | Rodio = (look above)  | 
In Basque | → Chemistry | 
| Rh | رادیم = (look above)  | 
In Persian | → Chemistry | 
| Rh | Rhodium = (look above)  | 
In French | → Chemistry | 
| Rh | Rodi = (look above)  | 
In Friulian | → Chemistry | 
| Rh | Roydjum = (look above)  | 
In Manx | → Chemistry | 
| Rh | Rodio = (look above)  | 
In Galician | → Chemistry | 
| Rh | 로듐 = (look above)  | 
In Korean | → Chemistry | 
| Rh | Ռոդիում = (look above)  | 
In Armenian | → Chemistry | 
| Rh | Rodij = (look above)  | 
In Croatian | → Chemistry | 
| Rh | Rodio = (look above)  | 
In Ido | → Chemistry | 
| Rh | Rodium = (look above)  | 
In Indonesian | → Chemistry | 
| Rh | Ródín = (look above)  | 
In Icelandic | → Chemistry | 
| Rh | Rodio = (look above)  | 
In Italian | → Chemistry | 
| Rh | רודיום = (look above)  | 
In Hebrew | → Chemistry | 
| Rh | Rodium = (look above)  | 
[JV] | → Chemistry | 
| Rh | Rodi = (look above)  | 
In Swahili | → Chemistry | 
| Rh | Rodyòm = (look above)  | 
In Haitian Creole | → Chemistry | 
| Rh | Rodyûm = (look above)  | 
In Kurdish | → Chemistry | 
| Rh | Rhodium = (look above)  | 
In Latin | → Chemistry | 
| Rh | Rodijs = (look above)  | 
In Latvian | → Chemistry | 
| Rh | Rhodium = (look above)  | 
In Letzeburgesh | → Chemistry | 
| Rh | Rodis = (look above)  | 
In Lithuanian | → Chemistry | 
| Rh | zgujinme = (look above)  | 
In Lojban | → Chemistry | 
| Rh | Ródium = (look above)  | 
In Hungarian | → Chemistry | 
| Rh | റോഡിയം = (look above)  | 
In Malayalam | → Chemistry | 
| Rh | र्होडियम = (look above)  | 
In Marathi | → Chemistry | 
| Rh | Rhodium = (look above)  | 
In Dutch | → Chemistry | 
| Rh | ロジウム = (look above)  | 
In Japanese | → Chemistry | 
| Rh | Rhodium = (look above)  | 
In Norwegian | → Chemistry | 
| Rh | Rhodium = (look above)  | 
In Nynorsk | → Chemistry | 
| Rh | Ròdi = (look above)  | 
In Occitan | → Chemistry | 
| Rh | Rodiy = (look above)  | 
In Uzbek | → Chemistry | 
| Rh | Rod = (look above)  | 
In Polish | → Chemistry | 
| Rh | Ródio = (look above)  | 
In Portuguese | → Chemistry | 
| Rh | Rodiu = (look above)  | 
In Romanian | → Chemistry | 
| Rh | Родий = (look above)  | 
In Russian | → Chemistry | 
| Rh | Rodiu = (look above)  | 
In Sicilian | → Chemistry | 
| Rh | Ródium = (look above)  | 
In Slovak | → Chemistry | 
| Rh | Rodij = (look above)  | 
In Slovenian | → Chemistry | 
| Rh | Родијум = (look above)  | 
In Serbian | → Chemistry | 
| Rh | Rodijum = (look above)  | 
In Serbo-Croatian | → Chemistry | 
| Rh | Rodium = (look above)  | 
In Finnish | → Chemistry | 
| Rh | Rodium = (look above)  | 
In Swedish | → Chemistry | 
| Rh | ரோடியம் = (look above)  | 
In Tamil | → Chemistry | 
| Rh | โรเดียม = (look above)  | 
In Thai | → Chemistry | 
| Rh | Rhodi = (look above)  | 
In Vietnamese | → Chemistry | 
| Rh | Rodyum = (look above)  | 
In Turkish | → Chemistry | 
| Rh | Родій = (look above)  | 
In Ukrainian | → Chemistry | 
| Rh | 铑 = (look above)  | 
In Chinese | → Chemistry | 
| RHCP | Right-Hand Circular Polarization | In English | → Optics | 
| 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  | 
| RICAM | Johann Radon-Institut für computerorientierte und angewandte Mathematik | In German | → Research institutes → Computer science → Mathematics  | 
| RICAP | Roma International Conference on Astroparticle Physics | In English | → Congresses → Astronomy  | 
| RIG | Rivista Italiana di Geofisica | In Italian | → Serial publications, periodicals → Geophysics → Italia  | 
| RIGSA | Rivista Italiana di Geofisica e Scienze Affini | In Italian | → Serial publications, periodicals → Geophysics → Italia  | 
| RIMS | Research Institute of Mathematical Sciences | In English | → Research institutes → Mathematics  | 
| RIN | Royal Institute of Navigation | In English | → Geodesy, cartography → Vehicle engineering → Transport and postal services  | 
| RIO | Ressourcenverbrauch reduzieren, Innovationen implementieren, Output optimieren | In German | → Environmental protection → Engineering, technology  | 
| RISC | Research Institute for Symbolic Computation (www.risc.uni-linz.ac.at) | In English | → Research institutes → Mathematics → Austria  | 
| RISC | RNA-Induced Silencing Complex | In English | → Genetics → Biochemistry, biophysics  | 
| RISCPT | Registre International des Substances Chimiques Potentiellement Toxiques | In French | → Chemistry → Chemical technology  | 
| RISH | Research Institute of Sustainable Humanosphere (www.rish.kyoto-u.ac.jp) | In English | → Research institutes → Ecology → Earth sciences → Japan  | 
| RITEAU | Réseau 'Eau et Technologies de l'environnement' | In French | → Environmental protection → Environmental technology, water supply, waste management  | 
| RITMER | Réseau 'Pollutions marines accidentelles et conséquences écologiques sur le littoral' | In French | → Environmental protection → Ecology  | 
| RJET | Russian Journal of Engineering Thermophysics | In English | → Serial publications, periodicals → Thermodynamics → Russia  | 
| RJMP | Russian Journal of Mathematical Physics | In English | → Serial publications, periodicals → Mathematics → Physics → Russia  | 
| RJTAM | Russian Journal Theoretical and Applied Mechanics | In English | → Serial publications, periodicals → Mechanics → Mechanical engineering → Russia  | 
| RKS | Ríbósakjarnasýru = ARN | Acidum ribonucleinicum | In Latin = RNA | Ribonucleic acid | In English = ARN | Acide ribonucléique | In French = РНК | Рибонуклеинова киселина | In Russian = ARN | حمض ريبي نووي | In Arabic = TRN | Trenkenn ribonukleek | In Breton = ARN | Àcid ribonucleic | In Catalan = RNK | Ribonukleová kyselina | In Czech = RNA | Ribonuklea acido | In Esperanto = RNS | Ribonukleinsäure | In German = ARN | Azido erribonukleiko | In Basque = ARN | Ácido ribonucleico | In Spanish = RNH | Ribonukleiinhape | In Estonian  | 
In Icelandic | → Genetics → Biochemistry, biophysics  | 
| RLE | Run-Length Encoding | In English | → Computer science → Algorithms  | 
| RMetA | Rivista di Meteorologia Aeronautica | In Italian | → Serial publications, periodicals → Meteorology, climatology → Aeronautics, aircraft  | 
| RMHI | Rocky Mountain Herbal Institute | In English | → Biological sciences → Medicine → Agricultural sciences  | 
| RMN | Résonance Magnétique Nucléaire = NMR | Nuclear Magnetic Resonance | In English = RMN | Ressonància Magnètica Nuclear | In Catalan = RMN | Risonanza Magnetica Nucleare | In Italian = תמ"ג | תהודה מגנטית גרעינית | In Hebrew = ЯМР | Я́дерного магни́тного резона́нса | In Russian = НМР | Нуклеарна магнетна резонанција | In Serbian  | 
In French | → Medicine → Nuclear, atomic, and molecular physics → Nuclear technology  | 
| RMN | Ressonància Magnètica Nuclear = NMR, תמ"ג, ЯМР, НМР (look above)  | 
In Catalan | → Medicine → Nuclear, atomic, and molecular physics → Nuclear technology  | 
| RMN | Risonanza Magnetica Nucleare = NMR, תמ"ג, ЯМР, НМР (look above)  | 
In Italian | → Medicine → Nuclear, atomic, and molecular physics → Nuclear technology  | 
| RMOS | Rice Microarray Opening Site | In English | → Genetics → Biotechnology → Agricultural sciences  | 
| RMS | Root Mean Square | In English | → Mathematics | 
| RMS | Royal Meteorological Society | In English | → Organizations and associations → Meteorology, climatology  | 
| RMxAA | Revista Mexicana de Astronomía y Astrofísica | In Spanish | → Serial publications, periodicals → Astronomy → Mexico  | 
| RMxF | Revista Mexicana de Física | In Spanish | → Serial publications, periodicals → Physics → Mexico  | 
| RN | Reynold's Number | In English | → Aerodynamics | 
| RNA | Ribonucleic acid = RKS, ARN, РНК, TRN, RNK, RNS, RNH (look above)  | 
In English | → Genetics → Biochemistry, biophysics  | 
| RNA | Ribonuklea acido = RKS, ARN, РНК, TRN, RNK, RNS, RNH (look above)  | 
In Esperanto | → Genetics → Biochemistry, biophysics  | 
| RNA | RNA Abundance Database | In English | → Data → Genetics → Biotechnology  | 
| RNAO | Resultados del Observatorio Nacional Argentino | In Spanish | → Serial publications, periodicals → Astronomy → Argentina  | 
| RNAOJ | Report of the National Astronomical Observatory of Japan | In English | → Serial publications, periodicals → Astronomy  | 
| RNB | Réseau National de Bassin | In French | → Hydrology | 
| RNDE | Réseau National des Données sur l'Eau | In French | → Organizations and associations → Hydrology → Environmental technology, water supply, waste management  | 
| RNH | Ribonukleiinhape = RKS, ARN, RNA, РНК, TRN, RNK, RNS (look above)  | 
In Estonian | → Genetics → Biochemistry, biophysics  | 
| RNK | Ribonukleová kyselina = RKS, ARN, RNA, РНК, TRN, RNS, RNH (look above)  | 
In Czech | → Genetics → Biochemistry, biophysics  | 
| RNOL | Réseau National d'Observation du Littoral | In French | → Threats to the environment | 
| RNP | Rotation, Nutation, and Precession | In English | → Astronomy | 
| RNR | Réserve Naturelle Régionale | In French | → Environmental protection | 
| RNS | Ribonukleinsäure = RKS, ARN, RNA, РНК, TRN, RNK, RNH (look above)  | 
In German | → Genetics → Biochemistry, biophysics  | 
| RNV | Réserve Naturelle Volontaire | In French | → Environmental protection | 
| ROAn | Royal Observatory Annals | In English | → Serial publications, periodicals → Astronomy  | 
| ROC | Reconnaissance Optique de Caractères = ORC | Optical Character Recognition | In English  | 
In French | → Writing systems → Document processing → Optics  | 
| ROCor | Resultados del Observatorio Argentino de Córdoba | In Spanish | → Serial publications, periodicals → Astronomy → Argentina  | 
| ROGVAIV | Roşu Oranj Galben Verde Albastru Indigo Violet | In Romanian | → Optics | 
| ROLun | Reports of the Lund Observatory | In English | → Serial publications, periodicals → Astronomy  | 
| ROM | Rough Order of Magnitude | In English | → Astronomy | 
| RomCo | Osservatorio Astronomico di Roma su Monte Mario - Contributi Scientifici | In Italian | → Serial publications, periodicals → Astronomy  | 
| ROMS | Regional Ocean Modeling System (www.myroms.org) | In English | → Marine research, oceanography | 
| RORSAT | Radar Ocean Reconnaissance Satellite | In English | → Marine research, oceanography → Astronautics  | 
| ROS | Reactive Oxygen Species | In English | → Biochemistry, biophysics | 
| ROSA | Romanian Space Agency | In English | → Central administration → Astronomy → Astronautics → Romania  | 
| ROSAT | ROentgen SATellite | In English | → Astronomy → Astronautics  | 
| RPDE | Réseau Partenarial des Données sur l'Eau | In French | → Organizations and associations → Hydrology → Environmental technology, water supply, waste management  | 
| RpMP | Reports on Mathematical Physics | In English | → Serial publications, periodicals → Mathematics → Physics  | 
| RPPh | Reports of Progress in Physics | In English | → Serial publications, periodicals → Physics  | 
| RRA | River Research and Applications | In English | → Serial publications, periodicals → Threats to the environment → Hydrology → Earth sciences  | 
| RRDAP | Recent Research Development in Applied Physics | In English | → Serial publications, periodicals → Physics  | 
| RRDBB | Recent Research Development in Biophysics and Biochemistry | In English | → Serial publications, periodicals → Biochemistry, biophysics  | 
| RRDBC | Recent Research Development in Biophysical Chemistry | In English | → Serial publications, periodicals → Biochemistry, biophysics  | 
| RRDCP | Recent Research Development in Chemical Physics | In English | → Serial publications, periodicals → Physics → Chemistry  | 
| RRDP | Recent Research Development in Physics | In English | → Serial publications, periodicals → Physics  | 
| RRDPC | Recent Research Development in Physical Chemistry | In English | → Serial publications, periodicals → Physics → Chemistry  | 
| RRDPF | Recent Research Development in Physics of Fluids | In English | → Serial publications, periodicals → Fluid mechanics  | 
| RRDSP | Recent Research Development in Statistical Physics | In English | → Serial publications, periodicals → Physics  | 
| rRKS | Ríplu ríbósakjarnasýru | In Icelandic | → Genetics → Biochemistry, biophysics  | 
| RRMPA | Revue Roumaine de Mathématiques Pures et Appliquées | In French | → Serial publications, periodicals → Mathematics  | 
| RRP | Research Reports in Physics | In English | → Serial publications, periodicals → Physics  | 
| RSA | Rheometrics Solids Analyzer | In English | → Physics | 
| RSC | Reference State of Cytoskeleton | In English | → Cytology | 
| RSEL | Remote Sensing and Ecology Lab | In English | → Research institutes → 505  | 
| RSEnv | Remote Sensing of Environment | In English | → Serial publications, periodicals → Threats to the environment → Earth sciences  | 
| RSL | Recurring Slope Lineae | In English | → Planets and satellites | 
| RSL | Regulator of Sex Limited Protein | In English | → Proteins | 
| RSL | Reference State of Lipid bilayer | In English | → Cytology | 
| RSNSW | Royal Society of New South Wales (http://nsw.royalsoc.org.au) | In English | → Organizations and associations → Australia  | 
| RSO | Radiological Safety Office | In English | → Accidents, risks, safety → Radioactivity  | 
| RSO | Resident Space Object | In English | → Astronomy → Astronautics  | 
| RSPB | Royal Society for the Protection of Birds | In English | → Organizations and associations → Environmental protection  | 
| RSPCA | Royal Society for the Prevention of Cruelty to Animals (www.rspca.org.uk) | In English | → Organizations and associations → 5023 → United Kingdom  | 
| RSQ | Remote Sensing Quarterly | In Dutch | → Serial publications, periodicals → Earth sciences  | 
| RSS | Residual Sum of Squares | In English | → Mathematics | 
| RSS | Recombination Signal Sequences | In English | → Genetics → Biochemistry, biophysics  | 
| RSS | Root Sum Square | In English | → Mathematics |