ACD

ACD is a three-letter acronym that may refer to:
* ACD, a rap duo from Queensbridge, New York
* ACD Systems, a computer software manufacturer
* Acid-citrate-dextrose, an anticoagulant
* Adelaide College of Divinity
* Adjourned in Contemplation of Dismissal
* Alveolar Capillary Dysplaysia
* Anaemia of Chronic Disease
* Angular Canopy Density
* Antecedent-contained deletion, a syntactic phenomenon
* Anterior Chamber Depth an important parameter of the eye
* Anti Collision Device, developed by Konkan Railway Corporation.
* Apple Cinema Display
* Arthur Conan Doyle, the author of Sherlock Holmes
* Asia Cooperation Dialogue, an international organization
* Australian Cattle Dog
* Automatic call distributor, telephony
* Autoregressive Conditional Duration, a class of models used in financial econometrics
* ACD (Mitsubishi), Mitsubishi Motor's automotive technology
* The CD release of Back Again in the DHSS by Half Man Half Biscuit
* Activity diagram, a type of UML diagram