IOR
IOR is used in academic and technical settings for operations research institutes, computing references like interface object references, and in business or community contexts for investment or religious institutes.
Medical
Miscellaneous
Interoperable Object Reference
Interrupt Offset Register
Independent Order Of Rechabites
Industry Optic Romania
Inst of Recruiters
Istituto Ortopedico Rizzoli
International Orientation Resources
Inland Oil Refinery
Importer of Record
Community
Governmental
Infiltrate, Observe, and Rescue
Institute of Operations Research
Institute of Refrigeration
Institute of Operational Risk
Institute of Recruiters