Governmental Abbreviations
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| Term | Meaning / Abbreviation |
|---|---|
| IOS |
IOS Stands For : Indian Ocean Ship | Indian Ocean Station | Input/Output Supervision | Instructor Operator Station. |
| IOSC |
IOSC Stands For : Integrated Operations Support Center. |
| IOU |
IOU Stands For : Input/Output Unit. |
| IPACS |
IPACS Stands For : Integrated Power and Attitude Control System. |
| IPAD |
IPAD Stands For : Integrated Program for Aerospace Vehicle Design. |
| IPDR |
IPDR Stands For : Incremental Preliminary Design Review. |
| IPSL |
IPSL Stands For : Interface Problem Status Log. |
| IPTCS |
IPTCS Stands For : Igloo Passive Thermal Control Section. |
| IR SPECT |
IR SPECT Stands For : Infrared Spectrometer. |
| IRAD |
IRAD Stands For : Independent Research And Development | Illinois Regional Archives Depository | Independent Research And Development. |
| IRAN |
IRAN Stands For : Inspection and Repairs as Necessary | Inspect and Repair As Necessary. |
| IRANSAT |
IRANSAT Stands For : Iranian Government Communications Satellite (replaces IRAN). |
| IRAR |
IRAR Stands For : Internal Variable. |
| IRD |
IRD Stands For : Information Requirements Document | Initiating Reference Document. |
| IRIG-B |
IRIG-B Stands For : Interrange Instrumentation Group B. |
| IRL |
IRL Stands For : Initiating Reference Letter | Interface Requirement List | Intermediate Range Lander. |
| IRME |
IRME Stands For : Initiator Resistance Measuring Equipment. |
| IRTCM |
IRTCM Stands For : Integrated Real-Time Contamination Monitor. |
| ISAS |
ISAS Stands For : Institute of Space and Astronautical Science. |
| ISBD |
ISBD Stands For : Inter- Sub- Band Detector | Idaho State Board of Dentistry. |
| ISCM |
ISCM Stands For : Initial Software Configuration Map. |
| ISCO |
ISCO Stands For : Innermost Stable Circular Orbit | International Standard Classification of Occupations. |
| ISEE |
ISEE Stands For : International Sun-Earth Explorer. |
| ISES |
ISES Stands For : International Space Environment Service. |
| ISIL |
ISIL Stands For : Interim Support Items List. |
| ISL |
ISL Stands For : Inertial Systems Laboratory. |
| ISL/LAR |
ISL/LAR Stands For : Integrated Logistics System and Logistics Assessment Review. |
| ISLM |
ISLM Stands For : Integration Shop/Lab Manager. |
| ISOL |
ISOL Stands For : Isolate. |
| ISPG |
ISPG Stands For : Institutional Support Planning Group. |
| ISRO |
ISRO Stands For : Indian Space Research Organisation. |
| ISTB |
ISTB Stands For : Integrated Subsystem Test Bed. |
| ISTF |
ISTF Stands For : Integrated System Test Flow. |
| ISTP |
ISTP Stands For : International Solar Terrestrial Physics. |
| ITCS |
ITCS Stands For : Internal Thermal Control System. |
| ITE |
ITE Stands For : Instrumentation Test Equipment | Integration Test Equipment | Intersite Transportation Equipment | Institute of Transportation Engineers. |
| ITI |
ITI Stands For : Inspection and Test Instruction. |
| ITMG |
ITMG Stands For : Integrated Thermal/Micrometeoroid Garment. |
| ITPA |
ITPA Stands For : Institute For Terrestrial And Planetary Atmospheres. |
| ITRDS |
ITRDS Stands For : Integrated Test Requirements Documents. |
| ITSC |
ITSC Stands For : Imaging Technology Space Center | Information Technology Steering Committee. |
| IUA |
IUA Stands For : Inertial Unit Assembly | Interface Unit Adapter. |
| IUCS |
IUCS Stands For : Instrumentation Unit Update Command System | Instrumentation Update Command System. |
| IUE |
IUE Stands For : Interface Unit Error-count table | International Ultraviolet Explorer | Israeli Underground Exchange. |
| IVAK |
IVAK Stands For : Igloo Vertical Access Kit. |
| IVAR |
IVAR Stands For : Internal Variable. |
| IVBC |
IVBC Stands For : Integrated Vehicle Baseline Configuration. |
| IVHM |
IVHM Stands For : Integrated Vehicle Health Monitoring. |
| IVL |
IVL Stands For : lntervatometer. |
| IVSI |
IVSI Stands For : Instantaneous Vertical Speed Indicator. |