Architectural Abbreviations and Acronyms

1. ORCHIS
   System
2. ORN
   Ornamentap
3. ORN
   Ornamental
4. ORP
   Operational Readiness Platform
5. OS
   On-Site
6. OS&Y
   Outside Screw and Yoke
7. OSD
   Open Sight Drain
8. OSP
   Off Street Parking
9. OSY
   Outside Screw and Yoke
10. OT
    Occupational Therapy
11. OTS
    Out of Service
12. OTW
    Out of This World
13. OTY
    Quantity
14. OUD
    Open Unlined Drain
15. OUT
    Ouvlet
16. OUT
    Outlet
17. OV
    Overflow
18. OVAL
    Overall
19. OVF
    Overflow
20. OVFL
    Overflow

Last updated: May 23, 2020 — Total entries: 4,265