RCOS
| Acronym | Definition |
|---|---|
| RCOS | Route Clearance Optics Suite (US DoD) |
| RCOS | Remote Control Operator Station (industrial engineering) |
| RCOS | Reformed Church of Satan (various locations) |
| RCOS | Reform Congregation Oheb Sholom (Pennsylvania) |
| RCOS | Routing Class of Service |
| RCOS | Rotary Club of Seminole (Florida) |
| RCOS | Roman Catholic Orphan School (Australia; 1841-1886) |
| RCOS | Reading Civic Opera Society (Reading, PA) |