COSB

AcronymDefinition
COSBCalifornia Oaks State Bank
COSBCouncil of Schools for the Blind (US and Canada)
COSBChamber Orchestra of the South Bay (California)
COSBClass of Service Buffer (data communications)
COSBCity of Oxford Silver Band (est. 1887; UK)
COSBCentral Operations and Systems Branch (Australia)