System Abbreviations and Acronyms

1. OPAL
   Obscurant Penetrating Autosynchronous Lidar
2. OPDS
   Offsoore Petroleum Discharge System
3. OPOS
   Objective Portable Operating System
4. OPRR
   Oregon Portage Rr
5. OPTRAN
   Optical Path Transmittance
6. OR&N
   Oregon Railway & Navigation Co.
7. ORCA
   No Expansion
8. ORR
   Oudh and Rohilkhund Railway
9. ORRI
   Orthorectified Radar Imagery
10. OS&H
    Ontario, Simcoe & Huron Rr
11. OSC
    Oahu Sugar Co.
12. OSDA
    Oregon State Departmentof Agriculture
13. OSDL
    Oregon Spatial Data Library
14. OSL
    Union Pacific Railroad
15. OTR
    Oudh and Tirhut Rjilway
16. OYWS
    Own Youx Wagon Scheme
17. PAIGH
    Pan-American Instituteof Geography and History
18. PAN
    Panama Rr
19. PB
    Peach Bottom Ry.
20. PBMC
    Port Blakely Mill Co.

Last updated: January 4, 2020 — Total entries: 1,214