(Main list of acronyms)
__NOTOC__ R – (i) Reinforcing – Right – (s) Röntgen – (i) Restricted (movie rating)
R0–9 R@R-(I) Respond as Receipt R0–99 – (i) R-value (insulation) R2I – (i) Resistance to Interrogation R3P – (i) Rearm, Refuel, and Resupply Point
RA Ra – (s) Radium RA – (a) Radio Australia RA (i) Radio altimeter (s) Rain (METAR Code) (i) Rear Area Reinforced Alert Republican Army (i) Resolution advisory Right Ascension Royal Academy Royal Artillery (UK) RAA (a) Royal Automobile Association (i) Rear Assembly Area RAAF – (i) Royal Australian Air Force Rabobank – (p) Raiffeisen-Boerenleenbank (from the two banks that merged to form the modern company) RAC (i) Royal Automobile Club (in the United Kingdom, renamed RAC plc in 2002) Rutgers Athletic Center, an indoor arena at the New Brunswick–Piscataway campus of Rutgers University RACK – (a) Risk Aware Consensual Kink (SM phrase) Racon – (p) RAdar beaCON RADA – (a) Royal Academy of Dramatic Art Radar – (p) Radio Detection And Ranging RADB (i) Real America Database Resource Assessment Database Reunion Address DataBase Rice Allelopathy Data Base Routing Arbiter Database RADb – (i) Routing Assets Data Base RadB – (s) Rad51/Dmc1 homologous protein RADC – (i) Region Air Defence Commander RAE – (i) UK Royal Aircraft Establishment (−1991) RAF – (i) Red Army Faction – Royal Air Force RAG (a) Raising and Giving Rocket Antitank Grenade RAGBRAI – (a) Register's Annual Great Bicycle Ride Across Iowa RAM – (a) Random Access Memory – Rolling Airframe Missile – Royal Air Maroc Ramark – (p) RAdar MARKer RAOC – (i) Rear Area Operation Centre RAP (a/i) Radio Access Point Radiological Assistance Program (U.S. Department of Energy) Rear Area Protection Recognised [Operating/Operational] Air Picture Recurring Advance Payment Relational Associative Processor Reliable Acoustic Path Rocket-Assisted Projectile Rule against perpetuities RAPIDS – (a) Real-Time Automated Personnel Identification System (US Department of Defense personnel authentication system) RARDE – (a) UK Royal Armament Research and Development Establishment (1962–1991) RARE – (a) Rapid Acquisition with Relaxation Enhancement (MRI technique) RASC – (a) Royal Army Service Corp (former corps of British Army) RATELO – (p) Radiotelephone Operator
RB Rb – (s) Rubidium RB – (i) Running back (football) R&B – (i) Rhythm and Blues RBAR – (i) Row by agonizing row – a derogatory way of describing a technique of scanning a set of records in a database to update or examine the contents of each one. This is the technique of last resort in most cases, since most database operations are optimized when using set based analysis instead of the RBAR method. RBCI – (i) Radio Based Combat Identification RBI (i) Reserve Bank of India (i) Runs batted In RBOC – (a/i) Regional Bell Operating Company ("Baby Bell")
RC RC – see entry RCA (i) Radio Corporation of America Root Cause Analysis Royal Canadian Artillery Royal City Avenue (famous entertainment zone in Thailand) RCAF – (i) Royal Canadian Air Force RCAR – (a) Research Council for Automobile Repairs ("are-car") RCC – (i) Rescue Co-ordination Centre RCCO – (i) Royal Canadian College of Organists RCHA – (i) Royal Canadian Horse Artillery (regiment) RCMP – (i) Royal Canadian Mounted Police RCRA – (a) Resource Conservation and Recovery Act ("reck-ra" or "rick-ra") RCS (i) Radar Cross-Section Reaction Control System Revision Control System RCT (i) Randomized Controlled Trial Robotically Controlled Telescope Rugby club toulonnais (French, "Toulon Rugby Club") RCZ – (i) Rear Combat Zone
RD R&D – (i) Research & Development RD – Radio Disney RDA (i) Research, Development, and Acquisition Recommended Daily Allowance (Nutrition) RDD – (i) Radiological Dispersion Device RDDL – (a/i) Resource Directory Description Language ("riddle") RDECOM – (p) (U.S. Army) Research, Development and Engineering Command RDM – (i) Remotely Delivered/Deliverable Mine RDO (i) Rapid, Decisive Operation(s) Regular Day Off Remote Data Objects RDS (i) Amazon Relational Database Service (i) Remote Desktop Services (Microsoft service) (i) Réseau des sports (French, "Sports Network" — Canadian French-language TV channel) (i) Respiratory distress syndrome (i) Royal Dublin Society (see also RDS Arena, a stadium on the grounds often called "the RDS") RDT – (i) Remote Digital Terminal RDTE or RDT&E – (i) Research, Development, Test, and Evaluation RDV – (i) Remote Detection Vehicle
RE Re – (s) Rhenium RE – (i) Requirements Engineering RE – (s) Royal Engineers REACH – (p) Registration, Evaluation, Authorisation and Restriction of Chemicals REACT – (a) Remote Electronically Activated Control Technology REAM – (a) Retired Educators Association of Minnesota RECCE – (a) Reconnaissance REEF – (a) Reef Environmental Education Foundation REM – (i/a) Rapid Eye Movement (sleep phase) – Rosicrucian Egyptian Museum REME – (a) Royal Electrical and Mechanical Engineers RERC – (i) Rehabilitation Engineering Research Center RES – (i) Radiation Exposure Status – (p) Reserve RESNA – (a) Rehabilitation Engineering and Assistive Technology Society of North America REU – (s) Réunion (ISO 3166 trigram)
RF Rf – (s) Rutherfordium RF – (i) Radio Frequency – Receptive Field (neurophysiology) RFA – (i) Restrictive Fire Area (military) – Royal Field Artillery RFC – (i) Request for Comments – Royal Flying Corps (WWI precursor to RAF) RFD – (a) Request for Documentation RFE – (i) Request for Evaluation RFEF – (i) Real Federación Española de Fútbol (Spanish for Royal Spanish Football Federation) RFI – (i) Ready For Inspection – Ready For Issue – Request For Information – Radio Frequency Interference RFID – (p) Radio Frequency IDentification RFL – (i) Rugby Football League RFL – (i) Restrictive Fire Line (military) RFP – (a) Request for Proposal RFQ – (a) Request for Quotation RFR – (i) Right of first refusal RFT – (a) Request for Tender RFU – (i) Rugby Football Union
RG Rg – (s) Roentgenium RG – (i) Republican Guard RGB – (i) Red Green Blue (colour model) RGBI – (i) Red Green Blue Intensity (ditto)
RH Rh – (s) Rhodium RH – (s) Southern Rhodesia (ISO 3166 digram; obsolete 1980) RHIC – (i) Relativistic Heavy Ion Collider RHLI – (i) Royal Hamilton Light Infantry (Canadian militia regiment) RHO – (s) Southern Rhodesia (ISO 3166 trigram; obsolete 1980) RHS – (i) Right Hand Side – Redland High School – (a) Royal Horticultural Society – London RHU – (i) Replacement Holding Unit RHWR – (i) Radar Homing and Warning Receiver ("raw" for short)
RI RI – (s) Rex et Imperator, Regina et Imperatrix King-Emperor RI – (s) Rhode Island (postal symbol) RIAA – (i) Recording Industry Association of America RIBA – (a) Royal Institute of British Architects RIF (i) Reduction In Force (layoffs) Resistance Index for Frostbite Reading Is Fundamental RIFA – (a) Red imported fire ant RILA – (a) Retail Industry Leaders Association RIM (a) Remote integrated multiplexer, Australian term for a digital loop carrier Research In Motion, former name of the BlackBerry company Revolutionary Internationalist Movement (Maoist organization) Royal Indian Marine, former navy of British colonial India RIMVS – (i) Retinal Imaging Machine Vision System RINO – (a) Republican In Name OnlyRepublican In Name Only RIP (a/i) Relief In Place (i) requiesca[n]t in pace (Latin for "may he/she/they rest in peace") RIS (i) Range Instrumentation System Réseau Info Sports (French, roughly "Sports News Network" — Canadian French-language TV channel) RISC – (i) Reduced Instruction Set Computer RISD – (p) Rhode Island School of Design ("riz-dee") RISTA – (a) Reconnaissance, Intelligence, Surveillance, and Target Acquisition (see also ISTAR) RWH – (a) Rain Water Harvesting
RJ RJD – (i) Reduced Julian Day
RK RKBA – Right to Keep and Bear Arms (Second Amendment to the United States Constitution) RKI – (i) Robert Koch Institute, German governmental research institute in Berlin RKO – (i) Radio-Keith-Orpheum Pictures
RL rL – (i) Rontolitre RL – (i) Release Line – Real Life – Ronnalitre RLP – (i) Recognised [Operating/Operational] Land Picture RLS – (i) Restless Leg Syndrome RLY – (p) Rally Point
RM RM – see separate disambiguation page rm – (s) Raeto-Romansh language (ISO 639-1 code) RMA – (i) Return Mailing Authorization – Revolution in Military Affairs – Rachel McAdams RMC – (i) Robert Menzies College RMC – (ii) Royal Military College (Australia, Canada, UK) RMDA – (i) Records Management and Declassification Agency RMP – (i) Recognised [Operating/Operational] Maritime Picture RMS – (i) Rate-Monotonic Scheduling – Richard M. Stallman – Root-Mean-Square – Royal Mail Ship (e.g. RMS Titanic)
RN rn – (s) Rundi language (Kirundi) (ISO 639-1 code) Rn – (s) Radon RN (a) Radio Netherlands (i) Registered Nurse (US) (i) Royal Navy right now, in text messages, direct messages, and emails RNA – (i) RiboNucleic Acid RNAD – Royal Naval Armaments Depot (UK) RNPS – (i) Radio Network Planning System RNZ – (a) Radio New Zealand RNZI – (a) Radio New Zealand International
RO ro – (s) Romanian language (ISO 639-1 code) RO – (i) Range Only – Red Orchestra – (s) Romania (ISO 3166 and FIPS 10-4 country code digram) ROA – (a/i) Rate Of Ascent ROC – (i/a) Receiver Operating Characteristic (statistics) – Regional Operations Centre – Republic Of China – Roc-A-Fella Records – Regional Organisations of Councils ROCV or ROC-V – (i) Recognition Of Combat Vehicles ("rock-vee") ROD – (a/i) Rate Of Descent – Record Of Decisions – Report Of Discrepancy ROE – (i) Rules Of Engagement roh – (s) Raeto-Romansh language (ISO 639-2 code) ROH – (i) Ring of Honor ROI – (i) Return On Investment, Republic of Ireland. ROME – (a) Return On Modeling Effort ROFL(MAO) – (i) Rolling On the Floor Laughing (My Ass Off) ROFLOL – (i) Rolling On the Floor Laughing Out Loud ROK – (a/i) Republic of Korea ROL – (s) Romanian leu (ISO 4217 currency code) ROM – (a) Read-only memory – Refuel On the Move – Royal Ontario Museum ron – (s) Romanian language (ISO 639-2 code) RON – (s) Romanian new leu (ISO 4217 currency code) ROP – (i) Render Output Pipeline ROPE – Research Opportunity and Performance Evidence RORO OR ro-ro – (a) Roll-On/Roll-Off (ferry) ROS – (i) Reactive Oxygen Species ROTC – (i) Reserve Officer Training Corps ("Rawt-Cee") ROU – (s) Romania (ISO 3166 trigram) ROV – (i) Remotely Operated Vehicle ROW – (i) Right Of Way – Rest Of the World ROWPU – (a) Reverse Osmosis Water Purification Unit ("roe-pew") ROY G BIV – colors of the prism; Red, Orange, Yellow, Green, Blue, Indigo, Violet ROZ – (a/i) Restricted Operations Zone
RP RP (s) Philippines (FIPS 10-4 country code) (i) Release Point (i) Reporting Party (Law Enforcement) Role-Playing [relationship potential] RPA – (i) Regional Plan Association RPD – (i) Recognition-Primed Decision-making RPF – (i) Rwandan Patriotic Front RPG (i) (US-CA) Regional Planning Group Report Program Generator Rocket Projectile Gun Rocket-Propelled Grenade Role-Playing Game RPI (i) Rating percentage index, a metric used in the selection of teams for many (U.S.) NCAA college sports tournaments Rensselaer Polytechnic Institute Retail price index, measure of inflation in the UK RPL – (i) Reverse Polish Lisp rpm – (s) revolutions per minute RPM (i) Rebated Precision Magnum, a family of rifle cartridges manufactured by Weatherby Records, Promotion, Music (expansion of the title of a former Canadian music magazine) Red Hat Package Manager RPN – (i) reverse Polish notation RPO (i) Radiation Protection Officer Regular Production Option Run-pass option, an offensive scheme in American football RPR FOM – (i/a) Realtime Platform Reference Federation Object Model ("reaper fomm") rps – (s) revolutions per second