| Acronym | Definition |
|---|
| HAM | [not an acronym] slang for Amateur Radio Operator |
| HAM | Hamlet (Amtrak station code; Hamlet, NC) |
| HAM | Homotopy Analysis Method |
| HAM | High and Mighty |
| HAM | Hak Asasi Manusia (Indonesian: Human Rights) |
| HAM | Holla at Me |
| HAM | Host Adapter Module |
| HAM | Hard As a Motherf*cker |
| HAM | Hardware Modem |
| HAM | Hold and Modify |
| HAM | Hybrid Access Method |
| HAM | Historical Anthology of Music |
| HAM | HTLV-1-Associated Myelopathy |
| HAM | Human Associative Memory (cognition) |
| HAM | Hypertext Abstract Machine (computing) |
| HAM | Hold And Modify (Amiga Graphics Mode) |
| HAM | High Alert Medication |
| HAM | Handheld Amateur Radio |
| HAM | Honda of America Manufacturing, Inc. (automobile manufacturer) |
| HAM | Height Adjustment Maneuver (US NASA) |
| HAM | High Altitude Mountaineering |
| HAM | Hospital-Acquired Malnutrition |
| HAM | High Availability Module (Internet connectivity) |
| HAM | Hamburg, Germany - Fuhlsbuttel (Airport Code) |
| HAM | Humans Against Monsters (gaming, Runescape group) |
| HAM | Hydrogenic Atoms in Molecules |
| HAM | Health, Action, Mind (Star Wars Galaxies) |
| HAM | Humans and Monsters (internet comic) |
| HAM | Hospital Account Manager |
| HAM | History, Allergies, Medications (medical) |
| HAM | Hankel Approximation Method |
| HAM | Haul Ass and Move |
| HAM | Hose Assembly Machine |
| HAM | Heat Alcohol Massage (things to avoid post Iinjury) |
| HAM | Hemodialysis Access Management (surgery) |
| HAM | Hierarchical Archive Manager |