| Capital Area Astronomy Association | Academic & Science |
| Canadian Academic Accounting Association | Academic & Science |
| Citizens Academy Alumni Association | Academic & Science |
| Centre for Applied Archaeological Analyses | Academic & Science |
| Ciescalifornia Association Of Adoption Agencies | Business |
| Council Of Arts Accrediting Associations | Business |
| Ciationcanada Asia Accord Association | Business |
| Canadian Aviation Artists Association | Business |
| Cal Aggie Alumni Association | Business |
| Cornell Asian Alumni Association | Business |
| California Applicant Attorney Association | Business |
| Canadian Aerial Applicators Association | Business |
| Certified Austrian Advertising Agency | Business |
| Chinese American Abacus Association | Community |
| Community Action Against Asthma | Community |
| Community Action Against Addiction | Community |
| Canadian Association of Advertising Agencies | Community |
| Cape Ann Animal Aid | Community |
| California Association of Adoption Agencies | Community |
| Community Action Association of Alabama | Community |
| Coherent Adaptive Antenna Array | Electronics |
| Clean Air Act Amendments | General |
| Clube de Autos Antigos de Araras | General |
| China Animal Agriculture Association | General |
| Confused About An Abbreviation? | General |
| Clean Air Act Amendments Of | General |
| Colorado Agriculture Aviation Association | General |
| Colorado Agricultural Aviation Association | General |
| California Agricultural Aircraft Association | General |
| Companion Animal Association of Arizona | General |
| Clean Air Act Amendments of 1990 | Governmental |
| California Applicant's Attorneys Association | Governmental |
| Washington State Commission on African American Affairs | Governmental |
| Crane Army Ammunition Activity | Military and Defence |
| Can African American Affairs | Regional |
| Commission on African American Affairs | Regional |
| Cheltenham African American Alliance | Regional |
