91 IRIS definitions

Integrated Risk Information System 
Italian Research Interim Stage 
Incorporated Research Institutions for Seismology 
Internationalized Resource Identifiers 
Internet Registry Information Service 
Illinois Researcher Information Service 
imaging of radicals interacting with surfaces 
Infrared Interferometer Spectrometer 
Instant Response Information System 
Instructional Resources Information System 
Insurance Regulatory Information System 
Interrogation Requirements Information System 
immune reconstitution inflammatory syndrome 
immune restoration inflammatory syndrome 
Incident Resource Inventory System 
Incorporated Research Institutions of Seismology 
Infrared Radiometer Interferometer Spectrometer 
Institute for Robotics and Intelligent Systems 
integrated radar imaging system 
Integrated Raster Imaging System 
Intelligence Resources Information System 
Intern and Resident Information System 
International Radio Interferometric Surveying 
Ilinois Research Information Service 
Image Retrieval and Information System 
Imagery Receiver and Intelligence System 
imaging radicals intersecting with surfaces 
Imaging Radiometer for Ionospheric Studies 
INCORPORATED RESEARCH INSTITUTE FOR SEISMOLOGY 
Incorporated Research Institutes for Seismology 
Incorporated Research Institution for Seismology 
Incorporated Reserach Institutions for Seismology 
Industrial Relations Information Service 
Information System 
Information, Robotics and Intelligent Systems 
Infrared Imaging Subsystem - Thermal Imager 
InfraRed Imaging Surveyor 
Infrared Imaging System 
Infrared Interferometer/Spectrometer 
Infra-Red Interferometric Spectrometer