| Acronym | Definition |
|---|
| NTTA➣North Texas Tollway Authority |
| NTTA➣National Trailer and Towing Association (Barford, England, UK) |
| NTTA➣National Technical Training Authority (est. 1999; Bhutan) |
| NTTA➣Network Termination and Testing Apparatus (telecommunications) |
| NTTA➣National Table Tennis Association |