Abbreviations beginning with a

ATISAAmerican Translation and Interpreting Studies Association (formerly ATSA)
Miscellaneous

ATI-SARAlong-Track Synthetic Aperture Radar Interferometry
Academic & Science

ATISSAdvanced Technology & Intelligent Systems Solutions
Computing » General

ATISSAnalysis Test and Integration of Sensor Systems
Miscellaneous » Unclassified

ATITAmerican Television Institute of Technology
Computing » Technology

ATITAmerican Television Institute of Technology
Governmental » Institutes

ATITAdmission Test for ICFAI Tech
Miscellaneous » Unclassified

ATITAdvanced Trends in Information Theory
Miscellaneous » Unclassified

ATITDA Tale in the Desert (MMORPG)
Governmental

ATIUAuto Theft Intelligence Unit
Miscellaneous » Automotive

ATIUSociete Auxiliaire De Transport et D'Industries
Regional » Railroads

ATIUSociete Auxillaire De Transport Et D'Industries
Regional » Railroads

ATIVAdjuvanted Trivalent Inactivated Vaccine
Medical

ATIWGATCCS (Army Tactical Command and Control System) Interoperability Working Group
Governmental » Military

ATIWGATCCS Interoperability Working Group
Governmental » Military

ATIXAlstom Transportation
Regional » Railroads

ATIZArtillery Target Information Zone
Governmental » Military

ATJAutomative Technology Group Ltd
Business » ASX Symbols

ATJAsian Theatre Journal
Community » Theater