| OASIS |
Observation
and Analysis of Smetic Islands in Space, LMM-7 |
| OCE |
Office
of the Chief Engineer |
| OCHMO |
Office
of the Chief Health and Medical Officer |
| OCR |
Operations
Change Request |
| OG |
Over
guide-line |
| OM |
Orbital
Module |
| OMB |
Office
of Management and Budget |
| ORR |
Operations
Readiness Review |
| ORU |
Orbital
Replacement Unit |
| OSD |
Office
of the Secretary of Defense |
| OSMA |
Office
of Safety and Mission Assurance |
| OV |
Operational
View |
| OZ |
NASA
JSC ISS Payload Integration Office |
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