| Association for History and Computing | Academic & Science |
| Annals of the History of Computing | Academic & Science |
| American Heritage Center, Laramie | Academic & Science |
| Allan Hancock College | Academic & Science |
| Architectural Heritage Center | Academic & Science |
| Academy of the Holy Cross | Academic & Science |
| Asset Holding Company | Business |
| Amway Hotel Corporation | Business |
| Amerada Hess Corporation | Business |
| Architectural Hardware Consultant | Business |
| AHC Ltd | Business |
| Accountable Health Communities | Community |
| Association for Humanistic Counseling | Community |
| Arts Humanities and Communications | Community |
| Arab High Committee | Community |
| Affordable Housing Connections | Community |
| Art History and Criticism | Community |
| After Housing Costs | Community |
| Affordable Housing Corporation | Community |
| Amsterdamsche Honkbal Club | Community |
| Attitude Heading Computer | Computing |
| Advanced High Speed Cmos | Computing |
| Adobe Help Center | Computing |
| Ads Help Center | Computing |
| Adobe Help Client | Computing |
| Accenture Hybrid Cloud | Computing |
| Advanced Hybrid Cloud | Computing |
| Administrative Hearing Commission | General |
| Automatic Headset Compensation | General |
| Adrenal Hypoplasia Congenital | General |
| Acute Hemorrhagic Cystitis | General |
| Aide Humanitaire Cameroun | General |
| Active Heave Compensation | General |
| Ampere Hour Capacity | General |
| Agglomerative Hierarchical Clustering | General |
| Active Heave Compensator | General |
| Adjustable Hydraulic Height Control | General |
| Atlas Honda Cars | General |
| Austin Healey Club | General |
| Ateliers Henri Chapron | General |
| Average Hourly Conflict Rate | General |
| Automatic Height Controller | General |
| Aromatic Hydrating Concentrate | General |
| American Heritage Center | General |
| Attitudinal Healing Connection | General |
| American Heroes Channel | General |
| Active Height Control | General |
| Appalachian Hardwood Center | General |
| American Healthcare Council | Governmental |
| American Horse Council | Governmental |
| Assault Helicopter Company | Governmental |
| Automated Head Count | Governmental |
| Async Http Client | Internet |
| Academic Health Care | Medical |
| American Health Consultants | Medical |
| Advantage Health Centers | Medical |
| Army Hospital Corps | Medical |
| Anterior Horn Cell | Medical |
| Academic Health Centre | Medical |
| Acute Haemorrhagic Conjunctivitis | Medical |
| acute hepatitis C | Medical |
| Advanced Home Care | Medical |
| Alternating Hemiplegia of Childhood | Medical |
| Alveolar Hydatid Cyst | Medical |
| Annual Health Check | Medical |
| Association of Healthcare Communicators | Medical |
| Academic Health Center | Medical |
| Austrian Health Care | Medical |
