| Acronym | Definition |
|---|
| OST➣Original Sound Track |
| OST➣Official Soundtrack |
| OST➣Out of School Time (after-school care programs) |
| OST➣Out of State Transfer (various applications) |
| OST➣Oglala Sioux Tribe (Pine Ridge, SD) |
| OST➣Offline Storage Table (computing) |
| OST➣Opioid Substitution Therapy (drug dependency) |
| OST➣Office of Science and Technology |
| OST➣Original Star Trek (TV series) |
| OST➣Opioid Substitution Treatment |
| OST➣Open Source Technologies (various locations) |
| OST➣On-Screen Text (Games) |
| OST➣On Screen Time |
| OST➣Open Systems Theory |
| OST➣On Second Thought |
| OST➣on Site Dedicated Training |
| OST➣Open System Technologies |
| OST➣Object Storage Target |
| OST➣Open Standards Terminal |
| OST➣Open Space Technology |
| OST➣Optical Storage Technology |
| OST➣Open Source Technology |
| OST➣Office Skills Test |
| OST➣Out-Service Training (various locations) |
| OST➣Office of the Secretary of Transportation |
| OST➣Old Spanish Trail |
| OST➣Office of the Special Trustee for American Indians |
| OST➣Organisation Scientifique du Travail (French: Scientific Labor Organization) |
| OST➣Oklahoma State Treasurer |
| OST➣Offline Store |
| OST➣Organizational Skills Training |
| OST➣Oblate School of Theology |
| OST➣Open Storage (software) |
| OST➣Outer Space Treaty |
| OST➣On-Screen Takeoff (construction planning) |
| OST➣Office of Secure Transportation (US Department of Energy) |
| OST➣Observatoire des Sciences et Techniques (French: science and technology observatory) |
| OST➣Officer Safety Training (various locations) |
| OST➣Operations Support Tool |
| OST➣Overseas Study Tour (various locations) |
| OST➣Optimal Solutions and Technologies (Washington, DC) |
| OST➣On-Site Technician (various companies) |
| OST➣Online Service Provider |
| OST➣Operations Support Team |
| OST➣Order Ship Time |
| OST➣Operational Sea Training |
| OST➣Open Skies Treaty |
| OST➣Oxford Superconducting Technology (New Jersey) |
| OST➣Office of Security Transition |
| OST➣Originating Station Treatment |
| OST➣Open Source Teaching |
| OST➣Orthogonal Space-Time (coding scheme) |
| OST➣Optical Standards Tester (Carcadiant Systems) |
| OST➣Operational Suitability Test |
| OST➣Oral Specimen Test |
| OST➣Order & Shipping Time |
| OST➣Objective, Strategy, Tactics (business/marketing) |
| OST➣Odonata Survey of Texas |
| OST➣Observational Sequence Table |
| OST➣Operational Requirements Document Support Team |
| OST➣OPTEC System Team |
| OST➣Optical Switch Technology |
| OST➣Over-Stress Test |
| OST➣Ormat Solar Turbine |
| OST➣Off-Station Trainer (US Air Force) |
| OST➣Oral Systemic Thermography (dental hygiene) |
| OST➣Oscillating Sand Abrasion Test |