English abbreviations from ros to row
- ROS (Reactive Oxygen Species)
- ROSAT ((telescope) ROentgen SATellite, an X-ray space telescope)
- ROSC (Regional Operations and Security Center)
- ROSE (Recycling Oil Saves The Environment)
- ROSS (Reach Out to Snohomish Seniors)
- ROT (Remote Operated Tool)
- ROTA (Royal Ordnance Training Ammunition)
- ROTC (Reserve Officers' Training Corps)
- ROTFL (Range Over Test Frequency Level)
- ROTHR (Relocatable Over-The-Horizon Backscatter Radar (USN))
- ROTP (Regular Officer Training Plan (Canada))
- ROTSE ((observing program/telescope) Robotic Optical Transient Search Experiment, an observing program for detecting the optical counterparts of gamma ray bursts; also the telescopes used in this program)
- ROU (Romania (ISO 3166 trigram))
- ROV (Remotely Operated Vehicle)
- ROV/WROV (Remotely Operated Vehicle/WorkClass Remotely Operated Vehicle, used for subsea construction and maintenance)
- ROVE (Recognition Of Volunteer Excellence)
- ROW (Roswell International Air Center)