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.
William Jefferson "Bill" 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. Clinton was the 40th Governor of Arkansas from 1979 to 1981 and 42nd Governor from 1983 to 1992, and Arkansas Attorney General from 1977 to 1979. A member of the Democratic Party, ideologically Clinton was a New Democrat, and many of his policies reflected a centrist "Third Way" political philosophy.
William Henry "Bill" Gates III (born October 28, 1955) is an American business magnate, investor, author, and philanthropist.
Bitcoin is a cryptocurrency and a payment system:3 invented by an unidentified programmer, or group of programmers, under the name of Satoshi Nakamoto.
Bipolar disorder, also known as manic depression, is a mental disorder that causes periods of depression and periods of elevated mood.
Birds (Aves), also known as avian dinosaurs, are a group of endothermic vertebrates, characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a lightweight but strong skeleton.
The Big Bang theory is the prevailing cosmological model for the universe from the earliest known periods through its subsequent large-scale evolution.
The Bible (from Koine Greek τὰ βιβλία, tà biblía, "the books") is a collection of sacred texts or scriptures that Jews and Christians consider to be a product of divine inspiration and a record of the relationship between God and humans.
The Billboard 200 is a record chart ranking the 200 most popular music albums and EPs in the United States, published weekly by Billboard magazine.