Federal Aviation Administration Abbreviations and Acronyms

1. IRS
   Interface Requirements Specification
2. IRT
   Integrated Requirement Team
3. IRU
   Inertial Reference Unit
4. IS
   Intermediate-System
5. IS-IS
   Intermediate System-Intermediate System Protocol
6. ISA
   International Organization for Standardization
7. ISAP
   Integrated Support and Acquisition Plan
8. ISC
   Initial System Capability
9. ISDN
   Integrated Services Data Network
10. ISM
    In-Service Management
11. IT
    Information Technology
12. ITAC
    International Telecommunication Union
13. ITEC
    Information Technology
14. ITTCC
    International Telegraph and Telephone Consultative Committee
15. ITU
    International Telecommunication Union
16. ITU-TSB
    International Telecommunication Union
17. ITWS
    Integrated Terminal Weather System
18. IV&V
    Independent Verification and Validation
19. IVD
    Ionospheric Vertical Delay
20. IVE
    Ionospheric Vertical Error

Last updated: September 10, 2020 — Total entries: 2,563