IOI

IOI may refer to:

Idiopathic orbital inflammatory disease
International Olympiad in Informatics
Interonset interval
Indication of interest, used in financial trading
Interest on Investment, a synonym for Return on Investment (ROI)
IO Interactive, a Danish video game developer
International Ombudsman Institute
IOI Group, a Malaysian conglomerate
I.O.I, a South Korean girl group formed from the television show Produce 101
Innovative Online Industries (IOI), the fictional corporation that employs most of the antagonists of the 2011 novel Ready Player One and its 2018 film adaptation

See also