| Acronym | Definition |
|---|
| R2R | Ready to Run |
| R2R | Rim to Rim (hiking) |
| R2R | Routine to Research (Thailand) |
| R2R | Router to Router |
| R2R | Read to Read |
| R2R | Ready 2 Ride |
| R2R | Roll-To-Roll (manufacturing) |
| R2R | Road 2 Recovery (foundation; Encinitas, CA) |
| R2R | Ready 2 Race |
| R2R | Run-To-Run |
| R2R | Ready 2 Rumble (video game by Midway) |
| R2R | Roadmap to Riches |
| R2R | Rags to Riches (Internet game) |
| R2R | Roadmap to Riches (multilevel marketing program) |
| R2R | Routes to Recovery |
| R2R | Recruitment to Recruitment |
| R2R | Record to Report |
| R2R | Right to Repair |
| R2R | Ready to Rage |
| R2R | Reads to Results (software) |
| R2R | Ready to Roll |
| R2R | Ready 2 Riot (gaming clan) |
| R2R | Rolling Deck to Repository (ocean data collection) |
| R2R | Reel-2-Reel (older recording devices) |
| R2R | Risk-to-Reward |
| R2R | Reef2reef.com (online forum) |
| R2R | Report to Revenue |