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IOI

IOI can refer to:

  • International Olympiad in Informatics
  • Internet Open Index, a free web search index
  • Interonset interval
  • Indicator of interest, gauge in seduction literature
  • Indication of Interest, used in financial trading
  • Interest on Investment, a synonym for Return on Investment (ROI)
  • IO Interactive
  • International Ombudsman Institute
  • IOI Group, IOI Corporation, industrial gas manufacturing in Malaysia, property development (Marriott Putrajaya Hotel and Palm Garden Hotel in Putrajaya), oil palm plantations
  • Internal Object Identifier, used in ControlNet Messaging (industrial network protocol for industrial automation applications)
  • I.O.I, a South Korean girl group
  • Innovative Online Industries, the fictional corporation that employs most of the antagonists of Ready Player One by Ernest Cline