| Acronym | Definition |
|---|
| RR | Relative Risk (medical/statistical) |
| RR | Railroad |
| RR | Road Runner |
| RR | Resource Record |
| RR | Range Rover (Land Rover) |
| RR | Roraima (Brazil) |
| RR | Risk Ratio |
| RR | Rolls-Royce |
| RR | Round Robin |
| RR | Road Rules (MTV show) |
| RR | Royal Rangers |
| RR | Royal Rangers (Christian boy's group sponsored by the Assemblies of God) |
| RR | Rules and Regulations |
| RR | Right Rear |
| RR | Rachael Ray (TV talkshow) |
| RR | Rapture Ready |
| RR | Reading Recovery |
| RR | Royal Rumble (World Wrestling Entertainment, Inc.) |
| RR | Ronald Reagan |
| RR | Response Rate |
| RR | Russian Roulette |
| RR | Ranch Road (Texas) |
| RR | Rate Ratio |
| RR | Russian River (California) |
| RR | Race Ready (motorcycles) |
| RR | Rate of Return |
| RR | Randy Rhoads (guitarist in Ozzy Osbourne) |
| RR | Riesgo Relativo (Spanish: relative risk) |
| RR | Racing Replica (Desmosedici Ducati bike) |
| RR | Right, Right |
| RR | Rational Recovery (recovery program) |
| RR | Roy Rogers |
| RR | Rural Route |
| RR | Rugrats |
| RR | Race Relations |
| RR | Ruff Ryders (band) |
| RR | Reroute |
| RR | Ridge Racer (video game) |
| RR | Red Rooster |
| RR | Reel-to-Reel |
| RR | Run Rate (cricket) |
| RR | Rock Ridge (Linux CD-Rom File System) |
| RR | Rolling Rock (beer) |
| RR | Web Reasoning and Rule Systems (conference) |
| RR | Relapsing-Remitting (Multiple Sclerosis) |
| RR | Rescue Rangers (cartoon) |
| RR | Rumble Roses (game) |
| RR | Recovery Room |
| RR | Refractoriness |
| RR | Return Result |
| RR | Respiration Rate |
| RR | Radio Relay |
| RR | Regierungsrat (Austria, Europe) |
| RR | Rest Room |
| RR | Resource Room |
| RR | Richie Rich |
| RR | Red Rocket |
| RR | Repetition Rate |
| RR | Remove & Replace |
| RR | Relative Rate |
| RR | Registered Representative |
| RR | Rest and Relaxation |
| RR | RickRoll |
| RR | Ribonucleotide Reductase |
| RR | Radio Regulations (ITU) |
| RR | Radio Resource |
| RR | Resistance Retribution (video game) |
| RR | Respiratory Rates |
| RR | Rural Road |
| RR | Response and Recovery |
| RR | Route Reflector |
| RR | Radio Rumantsch (Romansh Radio, Switzerland) |
| RR | Rashtriya Rifles |
| RR | Rocky Raccoon (Beatles song) |
| RR | Ready Reserve |
| RR | Random Ramblings |
| RR | Retired Reserve |
| RR | Ranger Rick |
| RR | Recoilless Rifle |
| RR | Reserve Ratio (finance) |
| RR | Receive Ready |
| RR | Requirements Review |
| RR | Recovery Repair |
| RR | Remediation and Redevelopment (Wisconsin Department of Natural Resources) |
| RR | Readiness Review |
| RR | Ready Room (gaming, Natural Selection) |
| RR | Remote Registry |
| RR | Room to Read |
| RR | Receiving Report |
| RR | Relay Rack |
| RR | Repair Request |
| RR | Riva Rocci |
| RR | Reregistered |
| RR | Ring Return |
| RR | Recall Rate |
| RR | Retro-Rocket |
| RR | Ragged Right (printing and publishing) |
| RR | Radio Regulatory |
| RR | Rain Rate (precipitation measurement) |
| RR | Revelation Records (record label) |
| RR | Rear-Engine Rear-Wheel-Drive |
| RR | Reverse Repurchase |
| RR | Restart Round (gaming) |
| RR | Roaring Rapids (amusement park ride) |
| RR | Redridge Mountains (gaming, World of Warcraft) |
| RR | Reference Receiver |
| RR | Reduced-Reference |
| RR | Rank Regression |
| RR | Red Ribbon Army (gaming) |
| RR | Reporting Responsibility |
| RR | Receive Ring |
| RR | Rosenthal & Rosenthal |
| RR | Road Robber |
| RR | Radio Rack |
| RR | Road Rover |
| RR | Review and Release |
| RR | Route Relay |
| RR | Rocket Rods |
| RR | Ripper Roo (Crash Bandicoot character) |
| RR | Reverse Request |
| RR | Relative Relief |
| RR | Rendezvous Radar |
| RR | Rejection Report |
| RR | Riparian Reserves |
| RR | Restart Recovery |
| RR | R-to-R Interval (the cycle between two consecutive R-waves) |
| RR | Reverse Relay |
| RR | Right Recursive (grammar parsing) |
| RR | Radiant Recovery |
| RR | Register to Register Instruction |
| RR | Reasoning and Rules |
| RR | Reuse Ratio |
| RR | Ruck Rover (Australian football position) |
| RR | Roper Resources (oceanic equipment manufacturer; Canada) |
| RR | reattack recommendation (US DoD) |
| RR | Reference Reflector (Agilent) |
| RR | Riparian Reaches |
| RR | Robot Resources |
| RR | Repetition Redundancy |
| RR | Refracted - Refracted |
| RR | Regional Reinforcement |
| RR | Recharge Ratio |
| RR | RivetRider (EC-130 special operations aircraft) |
| RR | Residential Rough (HVAC) |
| RR | Random Randumb (Slapstick & prank comedy web show) |
| RR | Raze Resources (forum) |
| RR | Refugees de Rwanda |
| RR | Restoral/Reconfiguration |
| RR | Renegotiation Regulation |
| RR | Rotary Rectifier |
| RR | Roaming Replicator |
| RR | Rebel Resistance (gaming) |