| Abbreviation | Definition |
|---|---|
| T/M/S | Type, Model, Series |
| T/O | Table of Organization |
| T/O | Theater of Operations |
| T/R | Transmit/Receive |
| T-1 | Jayhawk twin-engine trainer aircraft |
| T2C3 | Theater/Tactical Command, Control, and Communications |
| TA | Target Acquisition |
| TA | Target Analysis |
| TA | Target Area |
| TA | Target Audience |
| TA | Tartan Army |
| TA | Task Authorization |
| TA | Technical Analysis |
| TA | Technical Architecture |
| TA | Technical Arrangement |
| TA | Territorial Army |
| TA | Territorial Army (U.K.) |
| TA | Test Article |
| TA | The Army |
| TA | Theater Army |