List of acronyms: R

This list contains acronyms, initialisms, and pseudo-blends  that begin with the letter R.

For the purposes of this list:

  • acronym = an abbreviation pronounced as if it were a word, e.g., SARS = severe acute respiratory syndrome, pronounced to rhyme with cars
  • initialism = an abbreviation pronounced wholly or partly using the names of its constituent letters, e.g., CD = compact disc, pronounced cee dee
  • pseudo-blend = an abbreviation whose extra or omitted letters mean that it cannot stand as a true acronym, initialism, or portmanteau (a word formed by combining two or more words).
(a) = acronym, e.g.: SARS – (a) severe acute respiratory syndrome
(i) = initialism, e.g.: CD – (i) compact disc
(p) = pseudo-blend, e.g.: UNIFEM – (p) United Nations Development Fund for Women
(s) = symbol (none of the above, representing and pronounced as something else; for example: MHz – Megahertz)

(Main list of acronyms)

  • 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 – (s) Rain (METAR Code) – (i) Rear Area – Reinforced Alert – Republican Army – Right Ascension – Royal Artillery (UK) – Royal Academy
  • RAA – (a) Royal Automobile Association – South Australia – (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
  • 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
  • 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) Runs Batted In
  • RBOC – (a/i) Regional Bell Operating Company ("Baby Bell")

RC

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
  • RDS
  • RDT – (i) Remote Digital Terminal
  • RDTE or RDT&E – (i) Research, Development, Test, and Evaluation
  • RDV – (i) Remote Detection Vehicle

RE

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)
  • RFF – (i) Right of First Refusal (legal term)
  • 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
  • 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

RJ

RK

RL
  • RL – (i) Release Line – Real Life
  • RLP – (i) Recognised [Operating/Operational] Land Picture
  • RLS – (i) Restless Leg Syndrome
  • RLY – (p) Rally Point

RM

RN

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

RQ

RR
  • R&R – (i) Rest & Relaxation
  • RRB – (i) Railroad Retirement Board
  • RRN – (i) Recurrence Rate Number
  • RRP – (i) Recurrent Respiratory Papillomatosis
  • RRS – (i) Racing Rules of Sailing
  • RRSP – (i) Registered Retirement Savings Plan (Canada; roughly equivalent to the IRA in the U.S.)

RS

RT
  • RT – (i) Real Time – Radio Telephone – Respiratory therapist — (p) Return to duty
  • RTA – (i) Road traffic accident (British)
  • RTBF – (i) Radio-Télévision belge de la Communauté française
  • RTCA – (i) RTCA, Inc.
  • RTÉ – (i) Raidió Teilifís Éireann
  • RTF – (i) Rich Text Format
  • RTFM – (i) Read the Fucking/Fine Manual
  • RTG – (i) Radio-isotope Thermoelectric Generator also used for Rubber Tyred Gantry crane
  • RTGS – (a) Royal Thai General System of Transcription – Real Time Gross Settlement
  • RTI – (i) Run-Time Infrastructure (Simulation)
  • RTL – see entry
  • RTLS – (a) Return to Launch Site – period in NASA Space Shuttle assent profile where, during assent, shuttle aborts assent and turns and glides back to landing strip at launch site
  • RTPO-RM – (i) Real Time Production Optimization – Reservoir Management
  • RTP – (i) Real-time Transport Protocol
  • RT-PCR – (i) reverse transcriptase polymerase chain reaction (sometimes real-time polymerase chain reaction). Clarified with "quantitative PCR" ("qPCR") or "reverse transcriptase PCR" where appropriate.
  • RTS – see entry
  • RTT – (i) Round Trip Timing
  • RTV – (i) Rapid Terrain Visualization ACTD – Retro Television Network

RU

RV

RW
  • rw – (s) Rwanda language (Kinyarwanda) (ISO 639-1 code)
  • RW – (s) Rwanda (ISO 3166 and FIPS 10-4 country code digram)
  • RWA – (s) Rwanda (ISO 3166 trigram)
  • RWADA – (a) Resident Weighted Average Daily Attendance (New York State term used in public education to indicate the size of a school district, i.e. its number of students)
  • RWF – (s) Rwandan franc (ISO 4217 currency code)
  • RWR – (i) Radar Warning Receiver
  • RWS – (i) Remote Weapon Station

RX
  • Rx – (s) Medical prescription (possibly from Latin "recipere", "to take": see entry)
  • RX – (s) Receive

Notes and references
  1. Republican In Name Only
gollark: Wow, someone really did that?
gollark: Oh, here's another stupid one: "Wants: Free to good home! CB Hatchlings Only please!".
gollark: "Offers" is little better.
gollark: More cryptic, blank wants trades have hit the hubs. I wonder why people do this stuff.
gollark: They do look quite similar.
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