BI, Bi or bi might refer to:

  • Bi-, a number prefix denoting two

Businesses and organizations

Music

Science and technology

Computing

  • .bi, the Internet top-level domain for Burundi
  • Breidbart Index, a measure of the severity of Usenet newsgroup spam
  • Business informatics, the combined discipline of information technology and management
  • Business intelligence, in information technology, the discipline of dealing and analysing business-related information

Vehicles

Other uses in science and technology

  • Bismuth (symbol Bi), a chemical element
  • Biot number (Bi), a dimensionless quantity in physics

Other uses