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By or BY may refer to:



  • Belarus ISO country code
    • .by, country-code top-level domain for Belarus
  • Burundi FIPS Pub 10-4 and obsolete NATO digram country code
  • TUI Airways IATA airline code, formerly Thomson Airways, Thomsonfly and Britannia Airways

Other uses[edit]

  • John By (1779–1836), British military engineer famous for his work in Canada
  • CC-BY, a Creative Commons attribution license
  • Budget year, a synonym for fiscal year

See also[edit]


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