Arthur Conan Doyle, the author of Sherlock Holmes

ACD (Mitsubishi), Mitsubishi Motor's automotive technology

Australian Cattle Dog

Apple Cinema Display

Anaemia of Chronic Disease

Anti Collision Device developed by Konkan Railway Corporation.

Asia Cooperation Dialogue, an international organization

ACD is a three-letter acronym that may refer to:

Antecedent-contained deletion, a syntactic phenomenon

Automatic call distributor, telephony

ACD Systems, a computer software manufacturer

Acid-citrate-dextrose, an anticoagulant

Adjourned in Contemplation of Dismissal

Autoregressive Conditional Duration, a class of models used in financial econometrics

The CD release of Back Again in the DHSS by Half Man Half Biscuit