Alphabetical Listing of Uncategorized Acronyms
- RCCO — Royal Canadian College of Organists
- RCHA — Royal Canadian Horse Artillery (regiment)
- RCMP — Royal Canadian Mounted Police
- RCRA — Resource Conservation And Recovery Act (reck-ra Or Rick-ra)
- RCS — Radar Cross-Section – Revision Control System – Reaction Control System
- RCT — Randomized Controlled Trial – Robotically Controlled Telescope
- RCZ — Rear Combat Zone
- RD — Radio Disney
- RDA — Research
- RDD — Radiological Dispersion Device
- RDDL — Resource Directory Description Language (riddle)
- RDECOM — (U.S.) Research
- RDM — Remotely Delivered/Deliverable Mine
- RDO — Rapid
- RDT — Remote Digital Terminal
- RDTE OR RDT&E — Research
- RDV — Remote Detection Vehicle
- RE — Rhenium
- RE — Royal Engineers
- REACH — Registration
- REACT — Remote Electronically Activated Control Technology
- REAM — Retired Educators Association of Minnesota
- REEF — Reef Environmental Education Foundation
- REM — Rapid Eye Movement (sleep Phase) – Rosicrucian Egyptian Museum
- REME — Royal Electrical And Mechanical Engineers
- RERC — Rehabilitation Engineering Research Center
- RES — Radiation Exposure Status -Reserve
- RESNA — Rehabilitation Engineering And Assistive Technology Society of North America
- REU — R?union (ISO 3166 Trigram)
- RF — Radio Frequency – Receptive Field (neurophysiology)
- RF — Rutherfordium
- RFA — Restrictive Fire Area (military) – Royal Field Artillery
- RFC — Request For Comments – Royal Flying Corps (WWI Precursor To RAF)
- RFE — Request For Enhancement
- RFEF — Real Federaci›n Espa?ola De Fœtbol (Spanish For Royal Spanish Football Federation)
- RFI — Ready For Inspection – Ready For Issue – Request For Information – Radio Frequency Interference
- RFID — Radio Frequency IDentification
- RFL — Restrictive Fire Line (military)
- RG — Republican Guard
- RG — Roentgenium
- RGB — Red Green Blue (colour Model)
- RGBI — Red Green Blue Intensity (ditto)
- RH — Rhodium
- RH — Southern Rhodesia (ISO 3166 Digram; Obsolete 1980)
- RHIC — Relativistic Heavy Ion Collider
- RHLI — Royal Hamilton Light Infantry (Canadian Militia Regiment)
- RHO — Southern Rhodesia (ISO 3166 Trigram; Obsolete 1980)
- RHS — Right Hand Side – Redland High School
- RHU — Replacement Holding Unit
- RHWR — Radar Homing And Warning Receiver (raw For Short)
- RI — Rhode Island (postal Symbol)
- RIAA — Recording Industry Association of America
- RIF — Reduction In Force (layoffs) – Resistance Index For Frostbite
- RIMVS — Retinal Imaging Machine Vision System
- RIP — Relief In Place -requiesca[n]t In Pace (Latin For May He/she/they Rest In Peace)
- RIS — Range Instrumentation System
- RISC — Reduced Instruction Set Computer
- RISD — Rhode Island School of Design (riz-dee)
- RISTA — Reconnaissance
- RJD — Reduced Julian Day
- RKBA — Right To Keep And Bear Arms (Second Amendment To The United States Constitution)
- RKO — Radio-Keith-Orpheum Pictures
- RL — Release Line – Real Life
- RLP — Recognised [Operating/Operational] Land Picture
- RLS — Restless Leg Syndrome
- RLY — Rally Point
- RM — Raeto-Romansh Language (ISO 639-1 Code)
- RMA — Return Mailing Authorization – Revolution In Military Affairs
- RMC — Royal Military College (Australia
- RMDA — Records Management And Declassification Agency
- RMP — Recognised [Operating/Operational] Maritime Picture
- RMS — Rate-Monotonic Scheduling – Richard M. Stallman – Root-Mean-Square – Royal Mail Ship (e.g. RMS Titanic)
- RN — Royal Navy
- RN — Kirundi Language (ISO 639-1 Code)
- RN — Radon -Registered Nurse (USA)
- RNA — RiboNucleic Acid
- RNPS — Radio Network Planning System
- RO — Range Only – Red Orchestra -Romania (ISO 3166 And FIPS 10-4 Country Code Digram)
- RO — Romanian Language (ISO 639-1 Code)
- ROA — Rate of Ascent
- ROC — Receiver Operating Characteristic (statistics) – Regional Operations Centre – Republic of China – Roc-A-Fella Records
- ROCV OR ROC — V -Recognition of Combat Vehicles (rock-vee)
- ROD — Rate of Descent – Record of Decisions – Report of Discrepancy
- ROE — Rules of Engagement
- ROFL(MAO) — Rolling On The Floor Laughing (My Ass Off)
- ROH — Ring of Honor
- ROH — Raeto-Romansh Language (ISO 639-2 Code)
- ROI — Return On Investment
- ROK — Republic of Korea
- ROL — Romanian Leu (ISO 4217 Currency Code)
- ROM — Read-Only Memory – Refuel On The Move – Royal Ontario Museum
- RON — Romanian Language (ISO 639-2 Code)
- RON — Romanian New Leu (ISO 4217 Currency Code)
- ROP — Render Output Pipeline
- RORO OR RO — Ro -Roll-On/Roll-Off (ferry)
- ROS — Reactive Oxygen Species
- ROTC — Reserve Officer Training Corps (Rawt-Cee)
- ROU — Romania (ISO 3166 Trigram)
- ROV — Remotely Operated Vehicle
- ROW — Right of Way – Rest of The World