QD may refer to:

Businesses and organizations

• QD stores, a chain of discount retail outlets in England
• Dobrolet (low-cost airline) (IATA airline designator QD), a Russian low-cost carrier
• JC International Airlines (IATA airline designator QD), a Cambodian airline

Science and technology

• 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

• 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)

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