- ADIOS stands for Automated Download and Installation of Operating Systems
- ADIOS stands for Automatic Digital Input/Output System
- ADIOS stands for Angels Die in Outlaw States (motorcycle gang slogan)
- ADIOS stands for Approved Driving Instructors of Scotland (UK)
- ADIOS stands for Asian Dust Inputs to the Ocean System (study on how dust from the Gobi desert affects the oceans)
- ADIOS stands for Aegis Display Integrated Operating System (ships)
ADIOS