| Acronym | Definition |
|---|
| AHI | Apnea/Hypopnea Index |
| AHI | Acute HIV Infection |
| AHI | American Hellenic Institute (Washington, DC) |
| AHI | Alter Host Identifier |
| AHI | Action Health Incorporated (Nigeria) |
| AHI | Avian and Human Influenza |
| AHI | Airbus Helicopters, Inc. (Airbus Group, Inc.) |
| AHI | Animal Health Institute |
| AHI | African Highlands Initiative |
| AHI | Affordable Housing Initiative (US Army; Ft. Carson, CO, USA) |
| AHI | Afrikaanse Handelsinstituut (RSA) |
| AHI | Association for Heritage Interpretation (Britain) |
| AHI | Allied Health Instructor |
| AHI | American Health Initiative (est. 1999) |
| AHI | Accurate Home Inspections (New York) |
| AHI | Allied Holdings, Inc. (vehicle hauling company; Atlanta, GA) |
| AHI | Affordable Housing Institute (Boston, MA) |
| AHI | Amsterdam Holdings, Inc. (Philippines) |
| AHI | Augmented Human Interaction (UK) |
| AHI | Annual Household Income (also seen as AHHI) |
| AHI | American Household, Inc. (small appliances) |
| AHI | Actes de l'Histoire de l'Immigration (French: Records of Immigration History) |
| AHI | American Health Institute |
| AHI | Assistance Humanitaire Internationale (French: International Humanitarian Assistance) |
| AHI | Adventist Health International |
| AHI | Aesthetic and Humanistic Inquiry |
| AHI | Association of Heritage Industries |
| AHI | Aussie Home Inventories (New South Wales, Australia) |
| AHI | Atwell-Hicks, Inc. (offices in Brighton, Ann Arbor, Washington, & Naperville) |
| AHI | Artificial Horizon Indicator |
| AHI | Automated Hosting Inc. |
| AHI | Amp-Hour Integrator |
| AHI | Attitudinal Healing International |
| AHI | AeroHydro Incorporated (CAD Software, Southwest Harbor, Maine, USA) |