BBN might refer to:BBN The Business Branding Network, an international network of marketing and communications agencies with members in over 20 worldwide locations
BBN Technologies, formerly Bolt, Beranek and Newman, a technology company in Cambridge, Massachusetts, best known for its work on packet switching technology and its construction of the Interface Message Processor - the first router.
Bible Broadcasting Network, a global Christian radio network headquartered in Charlotte, North Carolina
Big Bang nucleosynthesis
Big Brother Nigeria, a reality show which took place in Nigeria
* Bayesian belief network, also known as
Buckingham Browne & NicholsSchool (BB&N), a private school in Cambridge, Massachusetts
* [9-Borabicyclononane|9-Borabicyclo [3.3.1] nonane] (9-BBN), a reagent used in organic chemistry
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