ATU
ATU is the abbreviation for:
- Aarne - Thompson - Uther, a revised version of the Aarne -Thompson index, a classification of fairy tales and vestibular groups
- ADSL Termination Unit
- Auto parts Unger, a car repair shop chain
- Association of Turkish entrepreneurs and start-ups eV
- Africa Triathlon Union, the umbrella organization of the national triathlon federations of Africa
Atu stands for:
- Sub-atmospheric pressure, pressure in at below the reference level
ATU is the prefix:
- The Austrian VAT identification number (UID )
- Disambiguation
- Abbreviation