(redirected from Orquestra Sinfônica de Porto Alegre)
OspAOuter Surface Protein A
OspAOffice of Sponsored Projects Administration
OspAOrquestra Sinfônica de Porto Alegre (Porto Alegre, Brazil)
OspAOregon State Pharmacy Association (est. 1889)
OspAOregon School Personnel Association
OspAOxygenated Solvent Producers Association
OspAOpen Services Partner Alliance (Avant Telecom, Inovative Systems, Nextone, Sonus)
OspAOhio School Psychologists Association
OspAOregon School Psychologists Association
OspAOklahoma School Psychological Association
OspAOperator Service Providers of America
OspAOregon State Poets Association
OspAOperations Security Professionals Association
OspAOffice of Systems Product Assurance
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