IRM

IRM may refer to: * IERS Reference Meridian * Illinois Railway Museum * Illinois Reserve Militia, state defense force active during World War II * Bureau of Information Resource Management, responsible for information technology of the U.S. Department of State * Information Rights Management * Intermediate Restorative Material (Dentistry) Zinc oxide eugenol * L'Institut Royal Météorologique de Belgique * Interference reflection microscopy, a microscopy method used to image adherent cells * Internal Revenue Manual, an official compendium of internal guidelines for personnel of the United States Internal Revenue Service * ''International Review of Mission'', a quarterly academic journal * International Roaming MIN assigned by IFAST * ''IRM'' (album), by Charlotte Gainsbourg * Iron Mountain Incorporated, a data storage company based in Boston, Massachusetts * ICAO designator for Mahan Air, an Iranian airline * Islamic Republic of Mauritania * Irish Republican Movement Provided by Wikipedia