NTK
| Acronym | Definition |
|---|---|
| NTK | Need To Know |
| NTK | Newton Toolkit |
| NTK | Nice to Know |
| NTK | Norsk Tindeklub (Norwegian mountaineering association; est. 1908) |
| NTK | Noise and Track Keeping (airport system) |
| NTK | Nitrate Test Kit (aquariums) |
| NTK | North Texas Karters (kart racing) |
| NTK | Näringslivets Telekoförening (Swedish) |