| Acronym | Definition |
|---|
| HMCA➣Health and Medical Care Archive (Inter-University Consortium for Political and Social Research; University of Michigan) |
| HMCA➣Health Management Corporation of America (Melville, NY) |
| HMCA➣High Moorland Community Action (UK) |
| HMCA➣Hispanic Marketing and Communication Association (Miami, FL) |
| HMCA➣Harvard Model Congress Asia (Harvard University; Cambridge, MA) |
| HMCA➣Her Majesty's Clockwork Army (band) |