- DIOS stands for District Inspector of Schools (India)
- DIOS stands for Desorption-Ionization on Silicon
- DIOS stands for Durable Inorganic Optical System (liquid crystal display projection system)
- DIOS stands for Distal Intestinal Obstructive Syndrome
- DIOS stands for Direct Iron Ore Smelting
- DIOS stands for Distributed Input/Output System
- DIOS stands for Lesbian Degree of Involvement and Overtness Scale
DIOS