sort by Rank | Alpha
| Possible Meanings | Rank |
| Coalition of Civil Society Organisations | **** |
| Clip Case Side Office | **** |
| Cape Cod Symphony Orchestra | **** |
| Computing and Communications Services Office | *** |
| Chief Corporate Services Officer | *** |
| Columbia Cascades Support Office | *** |
| Consortium of Civil Society Organizations | *** |
| Council for Student Organizations | *** |
| California Correctional Supervisors Organization | *** |
| Council of Snowmobile Organizations | *** |
| Country Code Supporting Organization | *** |
| Child Care Services Ordinance | *** |
| Coordinating Committee of Senior Officials | *** |
| Canadian Council of Snowmobile Organizations | *** |
| Cleveland County Sheriffs Office | *** |
| Coordinating Council for Student Organizations | *** |
| Caribbean Civil Society Organisations | *** |
| Creek County Sheriffs Office | *** |
| Chief Child Support Officer | *** |
| Concept for Special Operations | *** |
| Chief Common Sense Officer | ** |
| Country Code Supporting Organisation | ** |
| Casualty Claim Service Organization | ** |
| City of Cardiff Symphony Orchestra | ** |
| carson city sheriffs office | ** |
| Computing Communications Services Office | ** |
| Command Control Systems Office | ** |
| Corpus Christi Symphony Orchestra | ** |
| Cultural and Community Studies Office | ** |
| CROATIAN CULTURAL SOCIETY of OMAHA | ** |
| Childhood Care and Sponsorship Organization | ** |
| Coe College Symphony Orchestra | ** |
| Collier County Sheriffs Office | ** |
| Component Competitive Sourcing Officials | ** |
| Credit Card Servicing Organisations | ** |
| Central Computing Services Office | ** |
| County Community Strategy Officers | * |
| Citrus County Sheriffs Office | * |
| Canadian Cooperation Support Office | * |
| Certified Chief Security Officer | * |
| Charlotte County Sheriffs Office | * |
| Chief Constables Staff Officer | * |
| Component Competitive Sourcing Official | * |
| Collin County Sheriffs Office | * |
| Communications Computer Systems Officer | * |