| Acronym | Definition |
|---|
| OMS | Organisation Mondiale de la Santé (World Health Organization) |
| OMS | Organización Mundial de la Salud |
| OMS | Organização Mundial de Saúde |
| OMS | Order Management System |
| OMS | Oracle Management Server |
| OMS | Outage Management System |
| OMS | Organisation Mondiale pour la Santé (French: World Health Organization) |
| OMS | Optical Multiplex Section |
| OMS | Outlook Mobile Service (Microsoft Outlook 2007) |
| OMS | Organizzazione Mondiale Per La Sanità (Italy) |
| OMS | Order Management Software |
| OMS | Organizational Maintenance Shop |
| OMS | Organizational Maintenance Squadron (USAF) |
| OMS | Odorless Mineral Spirits |
| OMS | Osteopathic Medical Student |
| OMS | Over My Shoulder |
| OMS | Organic Mental Syndrome (neurological disorder) |
| OMS | Oregon Mycological Society |
| OMS | Octahedral Molecular Sieve |
| OMS | Operational Mode Summary |
| OMS | Operations and Marine Safety |
| OMS | Operation and Maintenance Subsystem |
| OMS | Output Per Man-Shift (mining) |
| OMS | Observatory Monitoring System |
| OMS | Orbital Maintenance System |
| OMS | Oh My Science |
| OMS | Ottoson Middle School (Arlington, Massachusetts, USA) |
| OMS | Offshore Marine Services, Ltd. (various locations) |
| OMS | Ohio Mushroom Society (Granville, Ohio) |
| OMS | Otitis Media Susceptibility |
| OMS | Ordnance Management System |
| OMS | Optically Modulated Scatterer |
| OMS | Online Mass Storage |
| OMS | Optimum Mode Selection |
| OMS | Ola Middle School (McDonough, Georgia) |
| OMS | Overseas Mission Society |
| OMS | Organic Matter Solubles |
| OMS | Operational Management Specialist (United Parcel Service) |
| OMS | Optimum Mass System (tennis racket) |
| OMS | Organizational Management Study |
| OMS | Operational Mission Scenario |
| OMS | Operating Measurement System |
| OMS | Organisation Main Secrète (French) |
| OMS | Offender Management System (Correctional Services Canada) |
| OMS | Organic Mass Spectrometry |
| OMS | Olympia Middle School (Stanford, IL) |
| OMS | Ollivier Middle School (California) |
| OMS | Optical Mouse Sensor |
| OMS | Object Management System |
| OMS | Object Model System (object-oriented data management system developed within GlobIS at ETH Zurich) |
| OMS | Open Management System |
| OMS | Onboard Maintenance System (aircraft) |
| OMS | Office of Migrant Services (California) |
| OMS | Occupational Medical Service |
| OMS | Office Management Specialist |
| OMS | Operations and Maintenance Services |
| OMS | Orientation and Mobility Specialist (healthcare) |
| OMS | Operation Management Service |
| OMS | Order Management Solution (software) |
| OMS | Oxford Management Services (Fort Pierce, FL) |
| OMS | Old Member State (EU) |
| OMS | Omsk (Russia) |
| OMS | Optical Management System (TeraBurst Networks) |
| OMS | Orbital Maneuvering System |
| OMS | Operational Method Sheet |
| OMS | Oral and Maxillofacial Surgeon |
| OMS | One Minute Silence (UK band) |
| OMS | Office of Mobile Sources |
| OMS | Offshore Medical Services |
| OMS | Oracle Media Server |
| OMS | Open Music System |
| OMS | Online Marketing Summit (various locations) |
| OMS | Offboard Mission Support (Joint Strike Fighter) |
| OMS | Operations Management System |
| OMS | Office of Museum Services (various organizations) |