BI, Bi or bi may refer to:
Binomial nomenclature (also called binominal nomenclature or binary nomenclature) is a formal system of naming species of living things by giving each a name composed of two parts, both of which use Latin grammatical forms, although they can be based on words from other languages.
Bitcoin is a cryptocurrency and a payment system:3 invented by an unidentified programmer, or group of programmers, under the name of Satoshi Nakamoto.
William Henry "Bill" Gates III (born October 28, 1955) is an American business magnate, investor, author, and philanthropist.
William Jefferson Clinton (born William Jefferson Blythe III; August 19, 1946) is an American politician who served as the 42nd President of the United States from 1993 to 2001. Prior to the Presidency he was the 40th Governor of Arkansas from 1979 to 1981 and the state's 42nd Governor from 1983 to 1992. Before that, he served as Arkansas Attorney General from 1977 to 1979. A member of the Democratic Party, Clinton was ideogically a New Democrat, and many of his policies reflected a centrist "Third Way" political philosophy.
The Big Bang theory is the prevailing cosmological model for the universe from the earliest known periods through its subsequent large-scale evolution.
Birmingham (/ˈbɜːrmɪŋəm/) is a major city and metropolitan borough of West Midlands, England lying on the River Rea, a small river that runs through Birmingham.
The Big Ten Conference (B1G), formerly Western Conference and Big Nine Conference, is the oldest Division I collegiate athletic conference in the United States.
The Big Five personality traits, also known as the five factor model (FFM), is a model based on common language descriptors of personality (lexical hypothesis).
In mathematics and digital electronics, a binary number is a number expressed in the binary numeral system or base-2 numeral system which represents numeric values using two different symbols: typically 0 (zero) and 1 (one).