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Intelligent Maintenance Systems *, A NSF Industry/University Cooperative Research Center found by Prof. Jay Lee currently at the University of Cincinnati

Institute of Materials Science *, The Institution belongs to the Vietnamese Academy of Science and Technology (VAST) *, Hanoi, Vietnam

If-Modified-Since *, a HTTP/1.1 header field used (by caches) to suppress download of unaltered objects

Immunomagnetic separation, a laboratory test

IMTEK Mathematica Supplement, open source Mathematica packages and tutorials

Independent Media Support or IMS media, a UK provider of access services to the media

The Indianapolis Motor Speedway

Industrial Methylated Spirit

Information Management System, a combination database management system and transaction processing system from IBM

Inventory Management System, a combination database management system in relation to Telco OSS/BSS

Institute of Mathematical Statistics

Institute Of Medical Sciences - BHU

Instructional Management Systems, broadly distributed distance learning standards (see IMS Global)

Insulated Metal Substrate, a substrate used in Power electronics applications.

Integrated Micro Solutions, a manufacturer of Graphics processing units.

Intelligent Mechatronic Systems, a University of Waterloo spin-off company based in Waterloo, Ontario

International Measurement System, a handicapping system for yacht racing.

Internet Map Server of ESRI

Internet Medieval Sourcebook, a web archive of Medieval source documents

Intramuscular Stimulation, an enhanced acupuncture technique used in physiotherapy for pain treatment

Ion mobility spectrometer, a highly sensitive analytical instrument

IP Multimedia Subsystem, a set of specifications from 3GPP

Irish Mathematical Society of Ireland

Irish Marching Society of Rockford, Illinois

Irritable Male Syndrome

Integrated Management Strategy, an intelligent guideline especially prepared for the megasite management purposes

Insight Meditation Society