What does OBB stand for?

Austrian Farmer's Association - Political party (PSAP)

Barry's Bay Public Library, Ontario - Library symbol - National Library of Canada (NLC)

Obbligato - Essential - Music

OB Boat Works, San Diego, CA - Manufacturer code for watercraft hull identification number (USCG)

Obsidian Butte - California - Seismograph station code, US Geological Survey (SEIS)

Oesterreichische Bundesbahnen - Austrian Federal Railways

Old Battleship - Navy

On-Board Buffer (CIST)

One Button Boy (SAUS)

Operation Better Block

Own Bed Bath - Medicine (DMAA)

Oxybisbenzene - Organic chemistry