NB

NB, Nb, or nb may refer to:

Arts and entertainment

Nota bene, often abbreviated as NB or n.b., a Latin phrase meaning "note well"
nb, ISO 639-1 code for Bokmål, the written standard of the Norwegian language
牛屄 (niúbī), a common word in Mandarin Chinese profanity

Niobium, symbol Nb, a chemical element
NB class, Australian steam locomotives
Boeing NB, a 1923 training aircraft
Naive Bayes classifier, in statistics
Neuroblastoma, a type of cancer
Nominal bore or nominal pipe size, a set of standard sizes for pipes
Nanobarn (nb), a unit of cross-sectional area
Mazda MX-5 (NB), the second generation of the Mazda MX-5
NB (programming language), an intermediate-stage language known as "New B" that evolved from the "B" language and then further evolved into the "C" language

NB Esports, Bangladeshi professional esports organization

Narrowboat ship prefix
National Battlefield, a protected area in the United States
No-ball in cricket
Non-binary, a term used by people who identify as neither male nor female.
NB, an abbreviation for North Britain used in addresses in Scotland in the nineteenth century e.g " 'The Sporran' Fifeshire, NB" (Used in The Importance of being Earnest" by Oscar Wilde.