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D1, D01, D.I, D.1 or D-1 can refer to:

Science and technology[edit]

and also :

  • "D1", a hexadecimal value equal to the decimal value 209
  • T-D1, the German T-Mobile mobile phone network former name
  • D01, Carcinoma in situ of other and unspecified digestive organs ICD-10 code
  • D-1, a West German funded and controlled STS mission.
  • D1, an abbreviation for DOCSIS 1.0, an international telecommunications standard.
  • D1, Russian trade name of an aluminum-copper-magnesium alloy




  • NCAA Division I, the highest division of American collegiate sports
  • The D1 Grand Prix (or D1GP), the premier drifting championship in the world
  • There are three other drifting series that use(d) the D1 moniker, related or not:


See also[edit]