AATIS
Arbeitskreis Amateurfunk und Telekommunikation in der Schule
ATIS
A Tools Integration Standard
ATIS
Automatic Terminal Information Service
ATIS
Automatic Transmitter Identification System
CITIS
Contractor Integrated Technical Information Service
A-GPS
Assisted Global Positioning System
A-SIT
Austrian Security Information Technology center
AA
American national standard code for information interchange (ASCII) Art
AACS
Advanced Access Content System
AAS
Advanced Automation System