| Campus Organization for Social Activities | Academic & Science |
| Company Of Science and Art | Academic & Science |
| Committee On Student Activities | Academic & Science |
| Council Of Student Activites | Academic & Science |
| Company of Science Art | Business |
| Cost Of Sales Adjustment | Business |
| Confederation of Oregon School Administrators | Business |
| Church Of the Scientific Advent | Community |
| Community Outreach Student Alliance | Community |
| Colliery Officials and Staffs Association | Community |
| Coptic Orphans Support Association | Community |
| Committee On Sustainability Assessment | Community |
| Construction Open Software Alliance | General |
| City of San | General |
| Circles of Support and Accountability | General |
| Cosmetic Outstanding Service Awards | General |
| Circle of Support and Accountability | General |
| Circles of Safety and Accountability | General |
| Child Occupational Self Assessment | General |
| City of St Augustine | General |
| Colliery Officials and Staffs Area | General |
| Car Wash Owners and Suppliers Association | General |
| City of San Antonio | General |
| Communications on Stochastic Analysis | General |
| Children's Organization of Southeast Asia | General |
| Cornerstone of Successful Achievement | General |
| Colorado Open Space Alliance | Governmental |
| Committee On Staff Affairs | Governmental |
| Council of School Attorneys | Governmental |
| Council of State Archivists | Governmental |
| Cámara Oficial Sindical Agrícola | International |
| Coordinator of Student Activities | Jobs |
| City Of Saint Augustine | Regional |
| County Office of Services for the Aging | Regional |
| Complementary Objects for Software Applications | Softwares |
| Central Ohio Soaring Association | Sports |
| Central Ohio Soccer Association | Sports |
