NASA Abbreviations and Acronyms

1. ORCM
   Orbiter Crash and Rescue Manuals
2. ORD
   Ordnance
3. ORD
   Operational Readiness Date
4. ORD
   Operational Ready Data
5. ORD
   Operational Requirements Document
6. ORD
   Order
7. ORD
   Operations Requirements Document
8. ORDC
   Orbiter Data Reduction Center
9. ORDN
   Ordnance
10. ORE
    On-Orbit Repair Experiment
11. ORF
    Orifice
12. ORI
    Ori Incorporated
13. ORI
    Orbital Replacement Instrument
14. ORID
    Operational Requirements Document
15. ORIDE
    Override
16. ORIEN
    Orientation
17. ORIENT
    Orientation
18. ORLENT
    Orientation
19. ORM
    Optical Reference Measurement
20. ORP
    Ofs Retransmission Processor

Last updated: May 6, 2025 — Total entries: 14,020