QD may refer to:

Businesses and organizations

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Science and technology

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  • Quantum dots, in nanotechnology
  • N-Gage QD, a handheld game console and smartphone
  • Dermatologicals, a veterinary ATC code D
  • Queue depth, a measure of concurrency in SSD benchmarking; see IOPS
  • Quick Disk, a type of miniature floppy disk used primarily in the 1980s

Other uses

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  • Quaque die, "every day" in Latin; mainly pharmaceutical usage
  • Quarterdeck, a raised deck behind the main mast of a sailing ship
  • The EU Qualification Directive (Directive 2011/95/EU of the European Parliament and of the Council of 13 December 2011 on standards for the qualification of third-country nationals or stateless persons as beneficiaries of international protection, for a uniform status for refugees or for persons eligible for subsidiary protection, and for the content of the protection granted)