| O&M | Operation and Maintenance 
| Others |
| O&M | Operations & Maintenance
| Others |
| O&M | Operations and Maintenance
| Others |
| O&M | Organization and Management
| Others |
| O&M | Organization and Method
| Others |
| OM | Afan (Oromo)
| Others |
| OM | Contour Multiunit
| Others |
| OM | Object Manager
| Others |
| OM | Object Marker
| Others |
| OM | Object Memory
| Others |
| OM | Object Model
| Others |
| OM | Object Modeller
| Others |
| OM | Obnoxious Moron
| Others |
| OM | Occult Material
| Others |
| OM | Occupational Medicine
| Others |
| OM | Ocelot Male
| Others |
| OM | Oel Motor
| Others |
| OM | Office Management
| Others |
| OM | Office Manager
| Others |
| OM | Office of Management
| Others |
| OM | Office Of Meteorology
| Others |
| OM | Official Mileage
| Others |
| OM | Officiating Minister
| Others |
| OM | Oh Merde
| Others |
| OM | Oh My
| Others |
| OM | Oh, Merde!
| Others |
| OM | Oil Mineral
| Others |
| OM | Old Maid
| Others |
| OM | Old Man
| Others |
| OM | Old Miss
| Others |
| OM | Old Model
| Others |
| OM | Old Monk
| Others |
| OM | Old Mutual
| Others |
| OM | Olympic Mountaineering
| Others |
| OM | Olympique de Marseille
| Others |
| OM | Olympus Maitani
| Others |
| OM | Om Means
| Others |
| OM | Omaha Field Office
| Others |
| OM | Omne Mane (every morning)
| Others |
| OM | Omni mane Every morning
| Others |
| OM | Omni-Lite Industries
| Others |
| OM | On Mushrooms
| Others |
| OM | On My ....
| Others |
| OM | Onboard Mop
| Others |
| OM | Onder Meer
| Others |
| OM | One Million
| Others |
| OM | One Mind
| Others |
| OM | One Moment
| Others |
| OM | Open Media
| Others |
| OM | Open Mind
| Others |
| OM | Open Minded
| Others |
| OM | Open Motorboat
| Others |
| OM | Operating Manager
| Others |
| OM | Operation Manual
| Others |
| OM | Operation Marketgarden
| Others |
| OM | Operation Migration
| Others |
| OM | Operation Mobilization
| Others |
| OM | Operational Measurement
| Others |
| OM | Operational Mid-MDM (Manipulator Deployment Mechanism)
| Others |
| OM | Operations Manager
| Others |
| OM | Operations Manual
| Others |
| OM | Operator Mechanic
| Others |
| OM | Optical Master
| Others |
| OM | Optical Multi
| Others |
| OM | Options Market
| Others |
| OM | Orange Man
| Others |
| OM | Orange Monkey
| Others |
| OM | Orange Moss
| Others |
| OM | Orchestra Model
| Others |
| OM | Orchestral Manoeuvres
| Others |
| OM | Orchestral Model
| Others |
| OM | Orden Ministerial
| Others |
| OM | Order Management
| Others |
| OM | Order of Magnitude
| Others |
| OM | Order of Merit
| Others |
| OM | Ordinanza Ministeriale
| Others |
| OM | Organic Material
| Others |
| OM | Organic Matter
| Others |
| OM | Organic Merchants
| Others |
| OM | Organizational Management
| Others |
| OM | Organizational Manager
| Others |
| OM | Orgasmic Meditation
| Others |
| OM | Oriental Male
| Others |
| OM | Oriental Medicine
| Others |
| OM | Orientational Melting
| Others |
| OM | Original Maestro
| Others |
| OM | Original Man
| Others |
| OM | Original Manufacturer
| Others |
| OM | Original Meditator
| Others |
| OM | Original Metal
| Others |
| OM | Original Music
| Others |
| OM | Osteomyelitis
| Others |
| OM | Osteopathic Manipulation
| Others |
| OM | Other Male
| Others |
| OM | Other Mother
| Others |
| OM | Otitis Media
| Others |
| OM | Out of Many
| Others |
| OM | Out of Memory
| Others |
| OM | Outer Marker
| Others |
| OM | Outer Membrane
| Others |
| OM | Outer Mitochondrial
| Others |
| OM | Output Mode
| Others |
| OM | Over Modulation
| Others |
| OM | Overall Maintenance
| Others |
| OM | Owner's Manual
| Others |
| OM | Owners Manual
| Others |
| OM | Society of Physicians
| Others |
| O|M | Organization and Methods
| Others |