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CX or Cx may refer to:

Businesses and brands[edit]

Science and technology[edit]

Biology and medicine[edit]


  • An interface in IP Multimedia Subsystems, using the diameter protocol, between Home Subscriber Server and Application Server
  • CX register, a general-purpose 16-bit X86 register
  • C++/CX (component extensions), a language extension for C++ compilers from Microsoft that enables C++ programmers to write programs for the Windows Runtime (WinRT)

Other uses in science and technology[edit]

  • CX (audio), a noise reduction system, most notably used for the analog audio tracks of laserdiscs
  • Cx, an abbreviation for the building commissioning process
  • Drag coefficient ( or )


Other uses[edit]

  • 110 (number), in Roman numerals
  • Chron X, an online collectable card trading game
  • Cross-examination debate, also known as Policy debate, a form of speech competition
  • Customer experience, the experiences a customer has with a supplier of goods or services
  • Cyclo-cross, a form of bicycle racing
  • Cx or cx, a digraph in the Esperanto x-system orthography, representing the consonant sound [t͡ʃ], normally spelled Ĉ or ĉ
  • Cx, a smiling emoticon