| Abbreviation | Definition |
|---|---|
| COAS | Council of Affiliated Societies |
| CoB | Company of Biologists |
| COC | Carl Orff Canada |
| CODIA | Colegio Dominicano de Ingenieros, Arquitectos y Agrimensores |
| CODIA | Dominican College of Engineers, Architects and Surveyors |
| CODS | Cheltenham Operatic and Dramatic Society |
| COEA | Co?legi Oficial d'Economistes d'Andorra |
| COEA | Co@legi Oficial d'Economistes d'Andorra |
| COEA | Colegi Oficial d'Economistes d'Andorra |
| COEA | Official College of Economists of Andorra |
| COESA | Co?legi Oficial d'Enginyers Superiors d'Andorra |
| COESA | Co@legi Oficial d'Enginyers Superiors d'Andorra |
| COESA | Colegi Oficial d'Enginyers Superiors d'Andorra |
| COESA | Official College of Higher Engineers of Andorra |
| COFIS | Colegio Oficial de Físicos |
| COFIS | Colegio Oficial de Fsicos |
| COFIS | Official College of Physicists |
| COGS | Canberra Organic Growers Society |
| COHS | Chesapeake and Ohio Historical Society |
| COI | ?????? ????????? ????????? |