DB-DB stands for Database to Database
DB-9 stands for Serial Communications D-Shell Connector, 9 Pins
DB-BLC stands for Dual-Band Branch-Line Coupler
DB-BPF stands for Dual-Band Bandpass Filter
DB-25 stands for Serial Communications D-Shell Connector, 25 Pins
dB(A) stands for A-Weighted Decibel
DB MW stands for Decibel (referenced to milliwatts)
dB nHL stands for Decibel Above Normal Adult Hearing Level
DB LTD stands for Denny & Bros Ltd Shipbuilders
DB MGR stands for Database Manager