| Abbreviation | Definition |
|---|---|
| OTN | Own the Night |
| OTND | Over To New Day |
| OTO | Operations And Training Officer |
| OTOE | Objective TOE |
| OTOT | One Time Occasional Tour |
| OTP | One Time Pad |
| OTP | Operational Test Plan |
| OTP | Opposite Track Path |
| OTP | Outline Test Plan |
| OTP | Outside The Perimeter |
| OTR | Office Of Technology Resources |
| OTR | Over The Road |
| OTRR | Operational Test Readiness Review |
| OTS | Officer Training School |
| OTS | Off-The-Shelf |
| OTS | One-Time Source |
| OTS | Operational Test Site |
| OTS | Optical Tracking System |
| OTSG | Office of the Surgeon General |
| OTSG | Office of the Surgeon General, Army |