Companies •
Integrated Medical Systems International, a former surgical instrument management and clinical consulting company •
Integrated Micro Solutions, a GPU manufacturer •
Intelligent Micro Software, a former developer of Multiuser DOS, REAL/32, and REAL/NG •
IMS Health (ticker symbol NYSE:IMS), a US company providing data services for healthcare •
IMS Associates, Inc., an early computer manufacturer •
IMS Bildbyrå, a Swedish stock photograph agency
Institutes •
IMS International Medical Services, of the State University Medical Center Freiburg, Germany •
Indian Mathematical Society •
Indian Medical Service, a military medical service in British India •
Indian Missionary Society, an Indian Catholic Religious Institute (Varanasi) •
Insight Meditation Society, a Buddhist organization in Barre, Massachusetts •
Institute of Mathematical Statistics •
International Magicians Society •
International Micropatrological Society •
International Military Staff, the executive body of the NATO Military Committee •
International Monitoring System, a division of the Comprehensive Nuclear-Test-Ban Treaty Organization •
International Mountain Society, for mountain research, Bern, Switzerland •
International Musicological Society, a learned society for musicology in Basel, Switzerland •
Irish Marching Society, Rockford, Illinois, US •
Irish Mathematical Society •
Iranian Mathematical Society Education •
IMS Unison University, formerly Institute of Management Studies, India •
Institute of Management Studies, Devi Ahilya University, Devi Ahilya University, India •
Institute of Medical Sciences, Banaras Hindu University, Varanasi, India •
Iowa Mennonite School, former name of Hillcrest Academy, Iowa, US •
Imaduddin School, Malé, Maldives ==Science and technology==