IOR

The abbreviation IOR may refer to:

• Institute of Recruiters, a non-profit Institute for recruiters and HR professionals
• Index of refraction
• Istituto per le Opere di Religione (Institute for Religious Works), the "Vatican Bank"
• Interoperable Object Reference, a reference to a CORBA or RMI-IIOP object
• Inhibition of return, a phenomenon in visual perception
• International Offshore Rule, an early handicapping system for yacht racing
• Interleaved or Random, a computer benchmark for I/O
• Independent Order of Rechabites
• inclusive or - as opposed to XOR (exclusive OR)
• IORgroup Ltd (formerly Interiors of Richmond), a London-based commercial interior design company
• I.O.R., optics company of Romania
• Interest on Reserves, a term used in macroeconomics having to do with reserves placed at the central bank
• India Office Records
• Indian Ocean Region
• Indian Ocean Rim.