BG, B.G., or bg may refer to:
The Ground Launched Cruise Missile, or GLCM, (officially designated BGM-109G Gryphon) was a ground-launched cruise missile developed by the United States Air Force in the last decade of the Cold War.
BG Group plc was a British multinational oil and gas company headquartered in Reading, United Kingdom.
BGP hijacking (sometimes referred to as prefix hijacking, route hijacking or IP hijacking) is the illegitimate takeover of groups of IP addresses by corrupting Internet routing tables maintained using the Border Gateway Protocol (BGP).
BGL Group is a financial services company based in Orton Southgate, Peterborough, England. Its main lines of business are vehicle and home insurance, with a range of supplementary products such as breakdown cover, legal protection and personal accident cover.
BGR Energy Systems Limited is a company headquartered at Chennai, operating in the utility industry, offering services ranging from product manufacturing to project execution.
BglII (pronounced "begel two") is a type II restriction endonuclease enzyme isolated from certain strains of Bacillus globigii.