Army Abbreviations and Acronyms

1. IRS
   Interface Requirements Specification
2. IRS
   U.S. Internal Revenue Service
3. IRSCC
   Interagency Remote Sensing Coordination Cell
4. IRSCOM
   Imagery Requirementg Subcommittee
5. IRST
   Infrared Search and Track System
6. IRSTS
   Infrared Search and Track System
7. IRTC
   Infantry Replacement Training Center
8. IRTC
   Infantry Replacement Training Centers
9. IRWG
   Issue Rekolution Working Group
10. IS
    Information System
11. IS
    Initial Spares
12. IS
    Isle
13. IS/T
    Integrated Simulation and Test
14. IS/T
    Integrated System Test
15. IS3
    In-Transit Security and Survivability System
16. ISA
    Intelligence Support Activity
17. ISA
    International Security Affairs
18. ISA
    International Standardization Agreement
19. ISA
    International Security Agreement
20. ISA
    Interservice Support Agreement

Last updated: December 19, 2021 — Total entries: 29,691