IOR may refer to:

Organisations

  • Independent Order of Rechabites, promoting alcohol abstinence
  • I.O.R. (Întreprinderea Optică Română), optics company of Romania
  • IOR (formerly Inland Oil Refiners), owner of the Eromanga Refinery in Australia
  • Institute for the Works of Religion, a Vatican financial institution
  • Institute of Refrigeration, a UK scientific charity and membership organisation

Science and technology

  • Inclusive or, in logic
  • Index of refraction, in optics
  • Inhibition of return, a phenomenon in visual perception
  • Interoperable Object Reference, a reference to a CORBA or RMI-IIOP object

<!--* IOR, a computer benchmark for I/O (fails WP:DABMENTION)-->

Other uses

  • Importer of record, in import and export
  • India Office Records, of the former administration of India

<!--* Indian Ocean Region (no article)-->

  • International Offshore Rule, an early handicapping system for yacht racing
  • Istituto per le Opere di Religione (Institute for Religious Works), the "Vatican Bank"

<!--* Interest on reserves, for reserves placed at a central bank-->

  • Inishmore Aerodrome (IATA airport code), Ireland

See also

  • Indian Ocean Rim Association (IORA)