BBACA stands for Botany Bay and Catchment Alliance (Australia)BBACA stands for Boating Books And Charts Austral
BB&N stands for Buckingham Browne & Nichols (Cambridge, Massachusetts school)BB&N stands for Bolt, Beranek, & Newman (usually BBN)
BAYSIS stands for Bay Networks' Switched Internetworking ServicesBAYSIS stands for Baikal Young Scientists' International School (Russia)