| African Centre for Disaster Studies | Academic & Science |
| Australian Council of Deans of Science | Academic & Science |
| Advanced Current Detection System | Academic & Science |
| Arkansas Center for Data Sciences | Academic & Science |
| Academic and Career Development Services | Business |
| Apprenticeship For Child Development Specialist | Community |
| American Contact Dermatitis Society | Community |
| Alexandria Country Day School | Community |
| Agricultural Community Development Services | Community |
| Aspen Country Day School | Community |
| Arundel Community Development Services | Community |
| Aylett Country Day School | Community |
| Association of Child Development Specialists | Community |
| Arlington Country Day School | Community |
| American College Development Solutions | Community |
| Agricultural and Community Development Services | Community |
| Atlanta Country Day School | Community |
| Apprenticeship of Child Development Specialist | Community |
| Association for Children with Down Syndrome | Community |
| Active Control Data Set | Computing |
| Active Clock Distribution System | Computing |
| Appeals Centralized Database System | Computing |
| Automatic Call Distribution System | General |
| Automatic Call Distributor System | General |
| Automatic Cloud Data Stack | General |
| Autonomous Control and Decision Systems | General |
| Assistant Chief of the Defence Staff | General |
| Automatically Controlled Digital Station | General |
| Advanced Countermeasures Dispensing System | General |
| Advanced Countermeasures Dispenser System | General |
| Automotive Cylinder Deactivation System | General |
| Auto Club des Deux Sevres | General |
| All Canadian Driving School | General |
| Auto Club Driving School | General |
| Australian Centre for Diabetes Strategy | Medical |
| Apprenticeship for Child Development Specialists | Medical |
| Acetyl Coenzyme-A Decarboxylase Synthase | Medical |
| Alameda County Dental Society | Medical |
| Advanced Clinical Decision Support | Medical |
| Army College of Dental Sciences | Medical |
| Athens County Dog Shelter | Regional |
