SEL
Security Enhanced Linux
VCSEL
Vertical Cavity Surface Emitting Laser
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
AES
Advanced Encryption Standard