Abbreviations beginning with o

OSTSOfice of Storage and Transporation Systems
Governmental

OSTSOld School Texas Surfing (Counter-Strike clan)
Miscellaneous

OSTSCOnsite Technical Support Center
Community

OSTSRDOther Specific Trauma and Stress Related Disorder
Miscellaneous » Unclassified

OSTTOrganizational Systems Technology Training
Business » General

OSTTOperational Safety and Tactics Training (Australia)
Governmental

OSTTOhev Sholom Talmud Torah (Washington, DC)
Miscellaneous

OSTTOperational Safety And Tactics Training
Miscellaneous » Unclassified

OSTTOral Sensory Threshold Testing
Miscellaneous » Unclassified

OSTTOral Sucrose Tolerance Test
Miscellaneous » Unclassified

OSTTOrder of the Silver Trident Trimaris (award)
Miscellaneous

OSTTBOntario Sales Tax Transition Benefit (Ontario, Canada)
Miscellaneous

OSTTBOntario Sales Tax Transition Benefit
Regional » Canadian

OSTXOstex International, Inc.
Business » NASDAQ Symbols