NB

NB, Nb, or nb may refer to:

• an abbreviation for nota bene, a Latin expression meaning "note well"
• the symbol for the chemical element Niobium
• an abbreviation for 'Not Bad'
• an abbreviation for 'Northbound'

Places:

• New Brunswick, a province of Canada
• North Britain, a historical term for Scotland
• New Baltimore (disambiguation), several towns
• New Britain (disambiguation), several places
• Sydney's Northern Beaches

In entertainment

• Nickelback, a Canadian rock band
• N.B. (album), an album by Natasha Bedingfield
• "New Born", a song by the British band Muse
• the nickname of Niko Bellic, a fictional character in the video game Grand Theft Auto IV
• NB (television show), a Scottish TV programme presented by Janice Forsyth, Bryan Burnett and Alan Campbell
• Nathan Barley, a 2005 British sitcom written by Charlie Brooker and Chris Morris for Channel 4

In science and technology:

• Notebook, a laptop computer
• Netbook, a type of laptop computer
• NetBeans, an integrated development environment created by Sun Microsystems
• Naive Bayes classifier, a simple probabilistic classifier in statistics
• Nominal Bore, a frequently used interchangeable term for Nominal Pipe Size (NPS)
• Northbridge (computing), a component on a computer motherboard

Other uses:

• Neuroblastoma, the most common solid extracranial tumor in children and infants
• New Balance, a shoe company
• Nigerian Breweries, a beverage company based in Nigeria
• Narrowboat, a particular size of water vessel found on English canals
• The ISO 639-1 abbreviation for the Bokmål written form of the Norwegian language
• 牛B (niúbī), a common word in Mandarin Chinese profanity