| Adolescent Community Reinforcement Approach | Academic & Science |
| Accounting and Corporate Regulatory Authority | Accounts and Finance |
| Accounting and Corporate Regulatory Authority (singapore) | Accounts and Finance |
| Associate of The Corporation of Registered Accountants | Accounts and Finance |
| Accounting and Corporate | Business |
| Australian Concrete Repair Association | Business |
| American Collegiate Retailing Association | Community |
| Aspen Chamber Resort Association | Community |
| Atlantic County Rowing Association | Community |
| American Car Rental Association | Community |
| Alliance of Canterbury Residents' Associations | Community |
| Allegheny County Retirees Association | Community |
| American Cultural Resources Association | Community |
| AIDS Community Residence Association | Community |
| American Collegiate Rowing Association | Community |
| Australasian Conference on Robotics and Automation | Community |
| Application Crash Report for Android | General |
| Application Crash Reports for Android | General |
| Advanced Clinical Research Award | General |
| Arkansas Collision Repair Association | General |
| Americas Collision Repair Association | General |
| Asociacion Civil Rally Argentino | General |
| Automated Club Romance Analyzer | General |
| Agriculture Crop Rotation Act | General |
| Associate Commissioner for Regulatory Affairs | Governmental |
| acetylcholine receptor antibody | Medical |
| Advisory Committee on Resource Allocation (obsolete, UK Department of Health) | Medical |
| Airlift Concepts and Requirements Agency | Military and Defence |
| Australian Cultivar Registration Authority | Regional |
| Amador County Recreation Agency | Regional |
| American Collegiate Rugby Association | Sports |
