OAM
- Medal of the Order of Australia
- Oamaru Aerodrome
- Object access method
- Observatorio Astronómico de Mallorca
- Office of Air and Marine
- Office of Alternative Medicine
- Official Museums of Amsterdam
- On a Mission (disambiguation)
- Open Compute Project
- Operations, administration, and management
- Oracle Identity Management
- Orbital angular momentum (disambiguation)
- OverActive Media
- Ozy and Millie