ARI
Autofahrer Rundfunk Information
ARIN
American Registry for Internet Numbers
ARIS
Architecture of Integrated Information Systems
CARIN
Car Information and Navigation System
DARI
Database Application Remote Interface (IBM)
A-SIT
Austrian Security Information Technology center
AA
American national standard code for information interchange (ASCII) Art
AASP
American national standard code for information interchange (ASCII) Asynchronous Support Package
ABTS
American standard code for information interchange (ASCII) Block Terminal Services
ACE
American national standard code for information interchange (ASCII) Compatible Encoding