MBR may refer to:

Science and technology

Computing Master boot record, the first sector of a partitioned data storage device, used for booting Memory buffer register Minimum bounding rectangle Minimum bit rate

Other fields Membrane bioreactor, in waste disposal Microwave background radiation, in cosmology Minimum bend radius, for installation of cables and pipes MBR Explorer, planned mission to several main belt asteroids

Publications The Malaysia Book of Records Mountain Bike Rider, a British magazine

Military Main battle rifle Morskoi Blizhniy Razvedchik, (Russian for "Naval Short Range Reconnaissance"), a class of flying boats, like the Beriev MBR-2

Places Middlesbrough railway station, England (by GBR code) Mohammed Bin Rashid Library, Dubai, United Arab Emirates

Other uses Maximum base rent, as used in rent control in New York Minerações Brasileiras Reunidas, an iron mining business

See also Movimiento Bolivariano Revolucionario 200 (MBR-200), a leftist political movement founded by Hugo Chávez in Venezuela