X1 denotes:

  • ATI Mobility Radeon X1 - Series, a series of graphics processors for notebooks
  • ATI Radeon X1 series, a series of desktop graphics chips from AMD
  • Bell X1, an Irish band from Celbridge, County Kildare
  • BMW X1, a sport utility vehicle
  • Electro Logica X1, an early digital computer
  • House X1, a Grade II listed house in Cologne Hahnwald
  • SL X1, a type of train in Sweden
  • Sony Ericsson X1, a smartphone
  • Wright Speed ​​X1, a prototype sports car ( roadster )
  • A class of interference suppression capacitors
  • A unique feature for the goodness-of T1

X -1, respectively:

  • Bell X-1, American experimental rocket plane and
  • Circinus X -1, an X-ray binary star in the constellation circle
  • Cygnus X-1, an X-ray binary star in the constellation Cygnus
  • Hercules X -1, a Röntgenpulsar
  • Scorpius X-1 is an X-ray source; about 9000 light years from Earth
  • X -1 ( submarine ), the only small submarine of the U.S. Navy
  • Disambiguation
  • Abbreviation