| Acronym | Definition |
|---|
| OPCM➣Oakland Public Conservatory of Music (California) |
| OPCM➣Optimal Pulse Code Modulation |
| OPCM➣Old Point Comfort Marina (Fort Monroe, VA) |
| OPCM➣Operative Plasterers and Cement Masons (labor union; Laurel, MD) |
| OPCM➣Office of Policy Coordination and Management (National Telecommunications and Information Administration) |
| OPCM➣Obrona Przeciw Ciemnym Mocom (Polish: Defense Against the Dark Arts; Harry Potter fan forum) |