OMS may refer to:

• O'Banion Middle School — Garland, Texas
• Odle Middle School — Bellevue, WA
• Odorless Mineral Spirits
• Oracle Management Server an executable component of Oracle database servers
• Manuel de Oms y de Santa Pau - apparatchik in the War of Spanish Succession, Viceroy of Peru
• Ontario Motor Speedway
• Open Media Commons
• Open Music System, once widely-used MIDI interface software (see: Opcode Systems)
• Opsoclonus myoclonus syndrome
• Oral and maxillofacial surgery
• Orbital Maneuvering System - rocket engines used on the Space Shuttle orbiters
• Order Management System
• Organization for the maintenance of supplies
• Omsætningsafgift, a Danish tax.
• One Minute Silence, a metal band
• IATA code for Omsk Tsentralny Airport
• Oms, Pyrénées-Orientales, a commune in southwestern France

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