| Acronym | Definition |
|---|
| NTT | Nippon Telegraph and Telephone Corporation |
| NTT | Nusa Tenggara Timur (Indonesia province) |
| NTT | National Trainers Team |
| NTT | Nippon Telegraph and Telephone |
| NTT | New Testament Theology |
| NTT | New Technology Telescope |
| NTT | National Technology Transfer, Inc |
| NTT | Name That Tune (TV game show) |
| NTT | Notice to Tenderers (New Zealand) |
| NTT | Non-Tariff Trade (economics) |
| NTT | National Tree Trust |
| NTT | New Technology Train (New York, NY) |
| NTT | National Think Tank (Nigeria) |
| NTT | Number Theoretic Transform |
| NTT | Nitrogen Tetroxide (rocket fuel) |
| NTT | No-Test Trunk |
| NTT | Núcleo de Transferência de Tecnologia (Brazil) |
| NTT | Nuclear Testing Talks |
| NTT | Noise Tolerance Threshhold |
| NTT | Núcleo Temático de Turismo (Brazil) |
| NTT | Non-Stationary Traffic Train |
| NTT | New True Talent (film production and acting; Los Angeles, CA) |
| NTT | Non-Traditional Threat |
| NTT | No Tasks in Training |