English abbreviations from r-s to ra
- R&S (Reconnaissance & Surveillance)
- R/S (Respectfully Submitted)
- r(s) (ring(s))
- r&w (read and write)
- R0 (Record zero)
- R2 (Reporting Responsibility)
- R2I (Resistance to Interrogation)
- R2P2 (Rapid Response Planning Process)
- R2R (Run-To-Run)
- R2T (Rails- To- Trails Conservancy)
- R2T2 (Rapid Response Topographic Teams)
- R3P (Rearm, Refuel, and Resupply Point)
- R4BIA (Ready for Brotherhood Independent Army)
- RA (Resolution advisory (TCAS))