| Acronym | Definition |
|---|
| OTSR➣Obrazkowy Test Slownikowy - Rozumienie (Polish: Visual Dictionary Test - Understanding; psychometric tool) |
| OTSR➣Optimum Track Ship Routing |
| OTSR➣Over The Shoulder Restraints (amusement rides) |
| OTSR➣Omni Transmit Sector Receive |
| OTSR➣Office of Transportation Security Redress (US Transportation Security Administration) |
| OTSR➣Other Than Selected Reserve (US Air Force) |
| OTSR➣Ornamental Transplant Soil and Root inoculants (mycorrhizae inoculants for horticultural use) |