English abbreviations from attp to au
- ATTP (Army Tactics, Techniques, and Procedures)
- ATTS (Air Transportable Towed System)
- ATTU (Air Transportable Treatment Unit)
- ATU (Casco Cove Coast Guard Station)
- ATV (All-terrain vehicle)
- ATVH (Appleton Thorn Village Hall)
- ATVI (Albuquerque Technical Vocational Institute)
- ATW (Outagamie County Regional Airport)
- ATWA (Air, Trees, Water, Animals)
- ATWE (Around the Tropic World Expedition)
- ATWG (Anti-Terrorism Working Group)
- ATX (Atbasar Airport)
- ATY (Watertown Regional Airport)
- ATZ (Assiut Airport)
- ATZ1 (Aerobic Training Zone 1)
- ATZ2 (Aerobic Training Zone 2)
- AtZn-MP (Arabidopsis thaliana Zinc-MetalloProtease)
- ATZP (Awakening To Zero Point)
- AU (Air University)
- A.U. (Alma Urbs ("Beloved City" i.e., Rome))