United States Abbreviations and Acronyms

1. OPS
   Operations Officer
2. OPS-O
   Operations Officer
3. OPSO
   Operations Officer
4. OR
   Oregon
5. ORA
   O'Reilly Associates
6. ORD
   Chicago O'Hare International Airport
7. ORE
   Oregon
8. ORF
   Norfolk International Airport, Norfolk, Virginia, United States
9. ORH
   Worcester Regional Airport, Worcester, Massachusetts, United States
10. ORI
    Port Lions SPB, Port Lions, United States
11. ORL
    Orlando Executive Airport, Orlando, Florida, United States
12. ORNL
    Oak Ridge National Laboratory's
13. OROX
    United States Department of Energy
14. ORQ
    Heliport, Norwalk, United States
15. ORSA
    Oxacillin-resistant Staphylococcus Aureus - Operations Research Society of America
16. ORT
    Northway Airport, Northway, Alaska, United States
17. ORU
    Oral Roberts University
18. OSC
    Oscoda-Wurtsmith AFB, Oscoda, MI, United States
19. OSD
    U.S. Office of The Secretary of Defense
20. OSEP
    Office of Special Education Programs at the U.S. Department of Education

Last updated: September 22, 2021 — Total entries: 5,551