Geographic Abbreviations and Acronyms
- OSTZOsterreichisches Statistisches Zentralamt
- OSUOregon State University
- OTAOffice of Technology Assessment (U.S.; abolished by Congress, Fall 1995)
- OTFOn-The-Fly (data acquisition method)
- OTHOver the Horizont
- OTHTOver The Horizon Targeting
- OUOpen Under
- OUOOfficial-Use Only
- OVNOptical visible near-infrared
- OWOil Well
- OWDCOffice of Water Data Coordination (USGS)
- OWRDOregon Water Resources Department
- OWRROffice of Water Resources and Research
- OWRTOffice of Water Research and Technology (DOI)
- OWSOgc Web Services
- PAADProgram Acronyms Abbreviations and Definitions
- PACOGPueblo Area Council of Governments
- PACONPacific Congress On Marine Science and Technology
- PADPosition Aware Device
- PADCOPlanning and Development Cooperative International
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