OMMS
| Acronym | Definition |
|---|---|
| OMMS | Organisation Mondiale du Mouvement Scout (French: World Organization of the Scout Movement) |
| OMMS | Organización Mundial del Movimiento Scout (Spanish; World Organization of the Scout Movement) |
| OMMS | Ordnance Mechanical Maintenance School (Aberdeen Proving Ground, Maryland) |
| OMMS | Orchard Mesa Middle School (Grand Junction, CO) |
| OMMS | Oak Meadow Montessori School |
| OMMS | Organizational Maintenance Management Subsystem |