Bruning
Bomb Release Unit
boresight reticle unit
BRANCH UNCONDITIONAL
Babies R Us
Backup and Restore Utility
Backup/Restore Utility
Barostatic Release Unit
Basic Resolution Unit
Battalion Replacement Factor
BATTERY RECONDITIONING UNIT
Battery Regulation Unit
Belavia Belarusian Airlines
Better Regulation Unit
Biotechnology Research Unit
bone remodeling unit
Broadcasting Research Unit
bromouracil
bromouridine
Brother
Brown University
Bruno
brushite
IATA code for Brussels International Airport, Brussels, Belgium
Border Rugby Union
Business Research Unit