MBR

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

• Membrane bioreactor, in waste disposal
• Microwave background radiation, in cosmology
• Minimum bend radius, for installation of cables and pipes

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

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

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

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

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

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