| Acronym | Definition |
|---|
| OMAC➣One Key Message Authentication Code |
| OMAC➣One-Key CBC Mac |
| OMAC➣One Man Army Corps |
| OMAC➣Open Modular Architecture Control(ler) |
| OMAC➣One Million and Counting (comic book) |
| OMAC➣Organization for Machine Automation and Control (Raleigh, NC) |
| OMAC➣Once A Month Cooking |
| OMAC➣Olney-Margolies Athletic Center (Brown University) |
| OMAC➣Observational Metahuman Activity Construct |
| OMAC➣Ocala Municipal Arts Commission (Florida) |
| OMAC➣Old Man's Aircraft Company (Albany, GA) |
| OMAC➣Orlando Modern Art Collection |
| OMAC➣Oman Airports Management Company |
| OMAC➣Operation Maintenance Administration and Control (Sprint) |
| OMAC➣Open Access Managed Choice (healthcare plan) |