| Acronym | Definition |
|---|
| OCM | Ocean City, Maryland |
| OCM | Organist and Choirmaster |
| OCM | Ocean Circulation Model |
| OCM | Organizational Change Management |
| OCM | Organization Change Management |
| OCM | Ordinary Council Meeting |
| OCM | Operational Change Management |
| OCM | Oxidative Coupling of Methane |
| OCM | Olympic Council of Malaysia |
| OCM | Osterweis Capital Management (est. 1983; Milwaukee, WI) |
| OCM | Oracle Certified Master (database administrator certification) |
| OCM | Old Colony Memorial (Plymouth, MA) |
| OCM | Outsourcing Contract Management |
| OCM | Operations Centre Manager |
| OCM | Optical Channel Monitor |
| OCM | Operating Committee Meeting |
| OCM | Organization for Competitive Markets |
| OCM | On-Camera Meteorologist (The Weather Channel) |
| OCM | Optical Countermeasures |
| OCM | Oven Control Module |
| OCM | Outreach Community Ministries (Illinois) |
| OCM | Ocean Colour Monitor (oceanographic data collection instrument) |
| OCM | Online Cash Management |
| OCM | Oracle Content Management |
| OCM | Oracle Certified Master |
| OCM | Oracle Connection Manager |
| OCM | Optional Component Manager |
| OCM | Operation Control Manager |
| OCM | Object Configuration Management (computing) |
| OCM | Order Change Management |
| OCM | Obsolete Computer Museum (est. 1995; website) |
| OCM | Oversea Chinese Mission (New York, NY) |
| OCM | Olimpiadas Colombianas de Matemáticas (Colombia) |
| OCM | Oil Content Monitor |
| OCM | Onondaga Cortland Madison (counties in New York) |
| OCM | Oil Cleansing Method (cosmetics) |
| OCM | Outlines in Clinical Medicine (medical resource) |
| OCM | Offshore Customer Management |
| OCM | Office of Conflict Management (various organizations) |
| OCM | Online Clearance Monitor (medical equipment) |
| OCM | Oriental Chain Manufacturing (Japan) |
| OCM | Office of Crisis Management (US FDA) |
| OCM | Original Component Manufacturer |
| OCM | Optical Channel Multiplexer |
| OCM | Ohio College of Massotherapy (Akron, OH) |
| OCM | On Condition Maintenance |
| OCM | Office of Coastal Management (Louisiana) |
| OCM | Online Corrosion Monitoring (water pipes) |
| OCM | Office of Compliance Monitoring |
| OCM | Orbit Correction Maneuver (US NASA) |
| OCM | Operating Capability Maintenance |
| OCM | Operations Cost Model |
| OCM | Orihuela Costa Magazine |
| OCM | Override Control Mode |
| OCM | Operator Configuration Message |
| OCM | Order of Crescent Moon (Odyssey Classic guild) |
| OCM | Ocean Color Mission |
| OCM | Outgoing Communications Manager (US Navy) |
| OCM | Officer Career Management (US and Australia) |
| OCM | Operational Change Memorandum |
| OCM | Operating Curve Management |
| OCM | Organization Computer Manager |
| OCM | Orange County Materials (OCM Test Laboratories, Inc.) |
| OCM | Oswal Cloth Mills |
| OCM | Ohio Columbus Mission (LDS church) |
| OCM | Operational Coordination Message |
| OCM | Organizational Configuration Management |
| OCM | Overhead Costing Module |
| OCM | Online Curriculum Manager (DeVry, Inc.) |
| OCM | Orbital Conjunction Message (US NASA) |
| OCM | Offshore Construction Manager (gas and oil) |
| OCM | Outlook Calendar Meeting (Microsoft Outlook) |
| OCM | Outer Carton Mark |
| OCM | Oral Contraceptive Medication |