| Academy ACAD AutoCAD design | Academic & Science |
| Alberta College of Art and Design | Academic & Science |
| A Cambridge Alumni Database | Academic & Science |
| Academics | Academic & Science |
| Acadia Group, Inc. | Business |
| Abex Corporation Amsco Division | Business |
| American Conference of Academic Deans | Community |
| Associated Churches Active in Disaster | Community |
| Applied Care and Development | Community |
| Avian Conservation Assessment Database | Community |
| Aurora Cultural Arts District | Community |
| Association of Catholic Admission Directors | Community |
| AutoCAD | Computing |
| Alberta College of Art & Design | Educational Institute |
| Anodized Ceramic Aluminum Diaphragm | Electronics |
| Autocad Database File | File Type |
| Asbestos Control and Abatement Division | General |
| Ambulatory Care And Diagnostic | General |
| Activity Centred Analysis and Design | General |
| Academy of Construction And Design | General |
| All Calls All Day | General |
| Asesoría CentroAmericana de Desarollo | International |
| Automatic Coherence Analysis of Dutch | International |
| Ambulatory Care And Diagnosis | Medical |
| Academy | Medical |
| Accelerated Coronary Artery Disease | Medical |
| Ambulatory Care and Diagnostic Centre | Medical |
| Asymptomatic Coronary Artery Disease | Medical |
| Atherosclerotic Carotid Artery Disease | Medical |
| Azithromycin in Coronary Artery Disease | Medical |
| Automatic Chemical Agent Detector | Military and Defence |
| Australian Centre for Ancient DNA | Regional |
| African Carbon Asset Development | Regional |
| Atlanta Conference for African Development | Regional |
