| Acronym | Definition |
|---|
| ROS➣Reactive Oxygen Species |
| ROS➣Riddle of Steel (band) |
| ROS➣Review of Systems |
| ROS➣Return On Sales |
| ROS➣Rosman, North Carolina |
| ROS➣Run of Site |
| ROS➣Rites of Spring |
| ROS➣Remote Operating System |
| ROS➣Robot Open Standard |
| ROS➣Run on Schedule |
| ROS➣Remote Outputs |
| ROS➣Return on Service |
| ROS➣Readout Server |
| ROS➣Run on Server |
| ROS➣Realtime Operating System |
| ROS➣Record on Silicon |
| ROS➣Remote Optimization Service |
| ROS➣Replica Optimization Service |
| ROS➣Remote Operation Services |
| ROS➣Read Only Storage |
| ROS➣Readout Subsystem |
| ROS➣Right of Survivorship |
| ROS➣Registers of Scotland |
| ROS➣Resistant Ovary Syndrome |
| ROS➣Raggruppamento Operativo Speciale (Italian Carabinieri Special Forces) |
| ROS➣Rapid Oxidative Stress |
| ROS➣Robot Operating System |
| ROS➣Rod Outer Segment (Ophthalmology) |
| ROS➣Regional Open Space (various locations) |
| ROS➣Random Orbital Sander |
| ROS➣Rate of Spread (wildland fire behavior expressed in chains per hour; 1 chain = 66 feet) |
| ROS➣Record of Service (USMC) |
| ROS➣Republic of Singapore (founded 1965) |
| ROS➣Read-Only Storage |
| ROS➣Royal Order of Scotland (Scottish Rite Honorary Order) |
| ROS➣Report Of Survey |
| ROS➣Run-On Sentence |
| ROS➣Review Of System |
| ROS➣Residual Oil Saturation |
| ROS➣Run Of Schedule |
| ROS➣Review of Symptoms (medical) |
| ROS➣Run Of Station |
| ROS➣Remote Operations Services |
| ROS➣Rain-on-Snow (meteorological event) |
| ROS➣Races of Stone (roleplaying games, Dungeons & Dragons) |
| ROS➣Report of Sale |
| ROS➣Reed Organ Society |
| ROS➣Resident Operating System |
| ROS➣Raster Output Scanner |
| ROS➣Rapport d'Ondes Stationnaires (French) |
| ROS➣Required On-Site (Date) |
| ROS➣Return From Overseas |
| ROS➣Refractory Organic Substances |
| ROS➣Religious Orders Study |
| ROS➣Region of Support |
| ROS➣Rosario, Santa Fe, Argentina - Fisherton (Airport Code) |
| ROS➣Recruit Office Support (Japan) |
| ROS➣Relief On Station (UAVs) |
| ROS➣Russian Orbital Segment |
| ROS➣Research Operations Support |
| ROS➣Remote Operator Station |
| ROS➣Restoration of Service |
| ROS➣Ramapo Orchid Society (New Jersey) |
| ROS➣Reviewing Official Statement (performance evaluation) |
| ROS➣Recreation Opportunity System (USFS/BLM) |
| ROS➣Registrar of Shipping |
| ROS➣Resource Object Store |
| ROS➣Release of Shift |
| ROS➣Required on Station |
| ROS➣Reactor Overflow System |
| ROS➣Range Operations Support |
| ROS➣Régiment des Opérations Spéciales (French: Special Operations Regiment) |
| ROS➣Restaurant Operations Support |
| ROS➣Register of Society |
| ROS➣Rear Observation System |
| ROS➣Retail On-the-Shelf (Amsoil) |
| ROS➣Rapid Obscuration System |
| ROS➣Remotely Operated Shutter |
| ROS➣Reconstitution Operational State |
| ROS➣Report Organization Subsystem |
| ROS➣Representative Observing Site |
| ROS➣Reduced Operation/al Status |
| ROS➣Re-Order Structure |
| ROS➣Ramsgate Operatic Society |