| Acronym | Meaning |
![](file.png) | ISCM | JSC Manual |
![](file.png) | ISI | Initial Systems Installation |
![](file.png) | ISI | Instrumentation Support Instruction |
![](file.png) | ISIL | Interim Support Items List |
![](file.png) | ISL | Inertial Systems Laboratory |
![](file.png) | ISL/LAR | Integrated Logistics System And Logistics Assessment |
![](file.png) | ISL/LAR | Review |
![](file.png) | ISLM | Integration Shop/Lab Manager |
![](file.png) | ISO | International Standardization Organizations |
![](file.png) | ISOL | Isolate |
![](file.png) | ISP | Initial Specific Impulse |
![](file.png) | ISP | Instrumentation Support Plan |
![](file.png) | ISP | Integrated Support Plan |
![](file.png) | ISPG | Institutional Support Planning GrouP |
![](file.png) | ISPM | International Solar Polar Mission |
![](file.png) | ISR | Initial System Release |
![](file.png) | ISS | Inertial Subsystem |
![](file.png) | ISS | Inhibit/Override Summary Snapshot Display |
![](file.png) | ISS | Installation Support Services |
![](file.png) | ISS | Instruction Summary Sheet |
![](file.png) | ISS | Integrated System Schematic |
![](file.png) | ISSL | Initial Spares Support List |
![](file.png) | ISSUING | AgeIssuing Agency |
![](file.png) | ISTA | Intertank Structural Test Assembly |
![](file.png) | ISTB | Integrated Subsystem Test Bed |
![](file.png) | ISTF | Integrated System Test Flow |
![](file.png) | IT | Identification Transponder |
![](file.png) | IT | Installation Test |
![](file.png) | ITA | Integrated Test Area |
![](file.png) | ITA | Integrated Test Article |
![](file.png) | ITAP | Integrated Technical Assessment Panel |
![](file.png) | ITC | Igloo Thermal Control |
![](file.png) | ITE | Instrumentation Test Equipment |
![](file.png) | ITE | Integration Test Equipment |
![](file.png) | ITE | Intersite Transportation Equipment |
![](file.png) | ITERATIVE | GIterative Guidance Mode |
![](file.png) | ITI | Inspection And Test Instruction |
![](file.png) | ITL | Integrate |
![](file.png) | ITMG | Integrated Thermal/Micrometeoroid Garment |
![](file.png) | ITO | Integration And Test Order |
![](file.png) | ITRDS | Integrated Test Requirements Documents |
![](file.png) | ITS | Instrumentation Telemetry Station |
![](file.png) | ITS | Interim Teleprinter System |
![](file.png) | IU | Instrument Unit |
![](file.png) | IU | Interface Unit |
![](file.png) | IU | Interface Unit |
![](file.png) | IUA | Inertial Unit Assembly |
![](file.png) | IUA | Interface Unit AdaPter |
![](file.png) | IUE | Interface Unit Error Count Table |
![](file.png) | IUS | Inertial Upper Stage |