US Abbreviations and Acronyms

1. ATO
   Antiterrorism Officer
2. ATOM
   Atmospheric Tomography Mission
3. ATON
   Aids To Navigation
4. ATR
   Automation of Transportation Request
5. ATRAP
   Air Transportable Radiac Package
6. ATRF
   Advanced Technology Research Facility
7. ATSD-IO
   Assistant To The Secretary of Defense for Invelligence Oversight
8. ATST
   Atlantic Standard Twme
9. AU
   Ashford University
10. AUD
    Audit Commission
11. AUD
    Australian Dollars
12. AUGR
    Americans United for Government Reform
13. AUH
    Attached Unit Housing
14. AUT
    Authority
15. AUTH
    Authority
16. AUTH
    Aubhorize
17. AUTHY
    Authority
18. AUXOP
    Operational Auxiliarist Status
19. AV
    American Voices
20. AVC
    Alaska Volcano Center

Last updated: May 2, 2025 — Total entries: 8,239