ATSU
| Acronym | Definition |
|---|---|
| ATSU | Air Traffic Services Unit |
| ATSU | AT Still University of Health Sciences (Kirksville, MO and Mesa, AZ) |
| ATSU | Accelerator Test Stand Upgrade |
| ATSU | Apple Type Services for Unicode |
| ATSU | Association of Time-Sharing Users |
| ATSU | Access Technology Support Unit (Royal National Institute of the Blind, UK) |