Rail Transport Abbreviations and Acronyms

1. IRN
   Ironton RR
2. IRRC
   Iowa R.R. Co.
3. IRRS
   International Rail Road Systems Incorporated
4. IRRS
   International Rail Road Systems, Inc.
5. IRSE
   Institution of Railway Signal Engineers
6. IS
   Inland Steel
7. IS
   Intermediate Signalling
8. ISAR
   Information Systems Activity Request
9. ISDN
   Integrated Services Digital Network
10. ISG
    Infrastructure Support Group
11. ISG
    International Steel Group
12. ISM
    Iecc System Monitor
13. IT
    Information Technology
14. ITAC
    International Telecommunication Union
15. ITC
    Illinois Terminal Railroad
16. ITCO
    Intracoastal Terminal Co
17. ITE
    Institute of Transportation Engineers
18. ITEC
    Information Technology
19. ITI
    Unknown
20. ITPM
    It Process Model

Last updated: May 24, 2020 — Total entries: 4,035