IOI may refer to: *

Idiopathic orbital inflammatory disease Idiopathic orbital inflammatory (IOI) disease refers to a marginated mass-like enhancing soft tissue involving any area of the orbit. It is the most common painful orbital mass in the adult population, and is associated with proptosis, cranial ner ...

International Olympiad in Informatics The International Olympiad in Informatics (IOI) is an annual competitive programming and one of the International Science Olympiads for secondary school students. It is the second largest science olympiad, after International Mathematical Olympi ...

* Interonset interval * Indication of interest, used in financial trading * Interest on Investment, a synonym for Return on Investment (ROI) *

IO Interactive IO Interactive A/S (IOI) is a Danish video game developer based in Copenhagen, best known for creating and developing the ''Hitman'' and '' Kane and Lynch'' franchises. IO Interactive's most recent game is '' Hitman 3'', which was released in J ...

, a Danish video game developer *

International Ombudsman Institute The International Ombudsman Institute (IOI), established in 1978, is the only global organisation for the cooperation of more than 200 independent Ombudsman institutions operating on a local, regional and national level from more than 100 countr ...

IOI Group IOI Corporation Berhad commonly referred to as IOI, was incorporated on 31 October 1969 as Industrial Oxygen Incorporated Sdn Bhd. IOI is one of Malaysia's biggest conglomerates. It ventured into property development in 1984, followed by oil ...

, a Malaysian conglomerate *

I.O.I I.O.I (; also known as IOI or Ideal of Idol) was a South Korean girl group formed by CJ E&M through the 2016 reality show ''Produce 101'' on Mnet. The group was composed of eleven members chosen from a pool of 101 trainees from various enterta ...

, 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 ''Ready Player One'' is a 2011 science fiction novel, and the debut novel of American author Ernest Cline. The story, set in a dystopia in 2045, follows protagonist Wade Watts on his search for an Easter egg in a worldwide virtual reality gam ...

'' and its 2018 film adaptation

See also