Objective Grating Spectrometer
Oxygen Generation System
Overseas Ground Station
Office of General Services
Office of Geological Survey
Ontario Geological Survey
Ontario Graduate Scholarship
Optical Grating Spectrometer
IATA code for Ogdensburg International…
objective grading system
off-gas system
Office of Graduate Studies
Official Gene Set
Oklahoma Geological Society
Oklahoma Geological Survey
oligogalacturonides
Ontario Geological Society
Ontario Graduate Scholarships
Opening General Session
Operator to General Support
opitz g syndrome
Osservatorio Geofisico Sperimentale
osteogenic sarcoma
Oxygen Generating System
Optional General Service
Oratory of the Good Shepherd