Legal Abbreviations and Acronyms

1. IR
   Irregular
2. IRAP
   Interdisciplinary Panel On Climate Change
3. IRB
   Internal Revenue Bulletin
4. IRC
   International Radiation Commission
5. IRC
   Internal Revenue Code of 1986
6. IRD
   Instituto de Radioprotecao e Dosimetria (Brazil)
7. IREG
   International Telecommunication Union
8. IREL
   Ireland
9. IRF
   instantaneous radiative transfer
10. IRG
    Interest Rate Guarantee
11. IRGA
    Infrared Gas Analyzer
12. IRI
    International Reference Ionosphere
13. IRIC
    Incident Reporting and Investigation Centre
14. IRIS
    Infrared Interferometer Spectrometer
15. IRIS
    Integrated Radar Imaging System
16. IRIS
    Incorporated Research Institution for Seismology
17. IRON
    Ironically
18. IRP
    Installation Restoration Program, Environmental, U.S. Air Force
19. IRREG
    Irregular
20. IRRI
    International Rice Research Institute

Last updated: May 24, 2020 — Total entries: 8,100