The initialism QCD can mean:

• Quantum chromodynamics, the theory describing the Strong Interaction
• Quintessential Player, formerly known as Quintessential CD
• Quality, Cost, Delivery, a three-letter acronym used in lean manufacturing
• Quad City DJ's, Southern rap group
• Quick Control Dial, a control on many DSLR cameras, like the Canon EOS 40D
• Quote-Comma-Delimited known also as Comma-separated values
• Quit-Claim Deed, a deed of property from one party to another without warranties or defense of the deed.

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