| CAOS | Calgary Animated Objects Society 
| Others |
| CAOS | Canadian Association of Optometry Students
| Others |
| CAOS | Catchments as Organised Systems
| Others |
| CAOS | Center for Atmosphere Ocean Science
| Others |
| CAOS | Central Alabama Offroad Society
| Others |
| CAOS | Centre for Atmospheric and Oceanic Sciences
| Others |
| CAOS | Centre for the Anthropology Of Sustainability
| Others |
| CAOS | Chapeltown Amateur Operatic Society
| Others |
| CAOS | Characteristic Attribute Organization System
| Others |
| CAOS | Chilling Adventures Of Sabrina
| Others |
| CAOS | Chronic Abruption Oligohydramnios Sequence
| Others |
| CAOS | Climate and Acidification Ocean Simulator
| Others |
| CAOS | Club of Amateurs in Optical Spectroscopy
| Others |
| CAOS | Code for Adaptive Optics Sys
| Others |
| CAOS | Code For Adaptive Optics Systems
| Others |
| CAOS | Coded Access Optical Sensor
| Others |
| CAOS | Commodore Amiga Operating System
| Others |
| CAOS | Complete Analytics Optimization Suite
| Others |
| CAOS | Computer Aided Orthopedic Surgery
| Others |
| CAOS | Computer Architecture Operating Systems
| Others |
| CAOS | Computer Assisted Orthopaedic Surgery
| Others |
| CAOS | Computer Assisted Otologic Surgery
| Others |
| CAOS | Computer Association of SIUE
| Others |
| CAOS | Computer-Assisted Orthopedic Surgery
| Others |
| CAOS | Conference Administration and Organisation Services
| Others |
| CAOS | Conference Administration and Organization Services
| Others |
| CAOS | Council of Atmospheric and Oceanic Sciences
| Others |
| CAOS | Creatures Agent Object Scripting
| Others |
| CAOS | CREOL Association of Optics Students
| Others |