IMR is a three-letter abbreviation with multiple meanings, including:
- Independent Medical Research/er
- In-Mold Decoration by Roller, the technology developed for surface decoration of plastic products.
- Ideo motor response, the original neuro-psychological theory of hypnotic suggestion
- Norwegian Institute of Marine Research
- Imperial Military Railways, the military railways established in South Africa by British invading forces during the Anglo-Boer war from 1898 to 1901.
- Improved Military Rifle, a type of gunpowder
- Infant mortality rate
- Institute for Materials Research, or Kinken in Japan
- Institutional Mode of Representation
- International Meshing Roundtable, International congress of mesh and grid generation.
- Interrupt, in computer science is used to disable interrupts
- In Medias Res, an indie rock band from Vancouver
- IMR-1, 2, and 3 armored engineering vehicles (Inzhenernaya mashina razgrazhdeniya), based on the Russian T-55, T-72, and T-90 tanks, respectively
- Inspection, Repair, Maintenance (used in Offshore Service operations)
- Institute of Metal Research, Chinese Academy for Sciences: www.imr.cas.cn
- Investor Mind Research, a company that forecasts stock market index change by determining investor sentiment: imr-forecast.com
- IMR Environmental Equipment, Inc. a company that manufactures gas analyzers for flue gas and automotive applications: imrusa.com
- IMR Test Labs, a materials testing lab, headquartered in Ithaca, NY
- Isolated Memory Region, in computers, refers to a memory region with a per-device access control