Scientific & Educational Abbreviations and Acronyms

1. OROM
   Opuscula Romana
2. OROX
   United States Department of Energy
3. ORP
   Oxidation-Reduction Potential
4. ORP
   Optimization of Radiation Protection
5. ORR
   Oak Ridge Reservation
6. ORR
   Orbit Readiness Review
7. ORR
   Oxidation Reduction Reaction
8. ORROE
   Occasional Reports of the Royal Observatory, Edinburgh
9. ORS
   Oregon Revised Statutes
10. ORS
    Orbital Refueling System
11. ORS
    Outer root sheath
12. ORS
    Organic Reconstruction Syrum
13. ORSE
    Otherwise
14. ORSS
    Oregon Revised Statutes
15. ORT
    Oak Ridge Tennessee
16. ORT
    Orbit Readiness Test
17. ORU
    Orbital Replacement Unit
18. ORU
    Organized Research Unit
19. ORU
    Oregon Riders Unlimited
20. ORU
    Oral Roberts University

Last updated: May 24, 2020 — Total entries: 44,184