interrupt service routine Installation Status Report Intelligence Surveillance and Reconnaissance Intermediate Session Routing Information Storage and Retrieval Intelligence, Surveillance and Reconnaissance Infrared Scanning Radiometer Institute of Surgical Research International Simple Resale Interrupt Service Routines Israel Incoherent Scatter Radar Incremental Summary Review Initial Service Release Initial System Release Institute for Software Research Institute for Standards Research Institute of Snow Research insulin secretion rate INTELSAT System Record Inter System Roaming Interim Systems Review Internal Service Request International Society of Radiology Interrupt Status Register INTERSECTING STORAGE RINGS Inter-System Routing Isothermal Systems Research Identification Safety Range image service representative Image Storage Retrieval Imagery Support Requirement Impervious Surface Ratio Implemented Status Report in situ rinse increasing stimulus rate Independent Science Review Independent Software Release Independent Study Review Independent Sufficiency Review
interrupt service routine
Installation Status Report