| Atlantic Circulation and Climate Experiment | Academic & Science |
| American College of Clinical Engineering | Academic & Science |
| Accreditation Council for Cooperative Education | Academic & Science |
| Academy for College and Career Exploration | Business |
| American Chamber Of Commerce Executives | Business |
| American Chamber of Commerce Estonia | Business |
| Association of Consulting Civil Engineers | Business |
| Achieving Career College Education | Business |
| Achieving College Career Education | Business |
| Association of Community Continuing Education | Community |
| Access to Community College Education | Community |
| Association of Community and Continuing Education | Community |
| American Council For Construction Education | Community |
| Adult Community College Education | Community |
| Alliance of Californians for Community Empowerment | Community |
| Automotive Composites Conference Exhibition | Community |
| Association of Chamber of Commerce Executives | Community |
| American Center for Credit Education | Community |
| Advanced Configurable Crypto Environment | Computing |
| Automotive Composites Conference and Exhibition | General |
| Audi Club Canada East | General |
| American Cruisers Club Eidsvoll | General |
| Antwerp Classic Car Event | General |
| Audi Classic Club de Espana | General |
| Association Canadienne du Camionnage d'Entreprise | General |
| American Council of Construction Educa | General |
| Authenticated And Confidential Channel Establishment | General |
| American Council of Construction Education | General |
| Aspen Capital Cost Estimator | General |
| Asian Centre For Certification And Education Of Addiction Professionals | General |
| Alcohol Cannabis Cocaine and Ecstasy | General |
| Air Component Coordination Element | Governmental |
| Arts Culture and Civic Engagement | Governmental |
| Advisory Council of Classified Employees | Governmental |
| Accelerating Clinical Coordinator Excellence | Medical |
| African Center for Community Empowerment | Regional |
| Association of Chinese Canadian Entrepreneurs | Regional |
| Australian Council for Computers in Education | Regional |
| American City County Exchange | Regional |
| Association of Corporate Counsel Europe | Regional |
