ACD may refer to:
Brands and enterprises ACD (telecommunications company), carrier and Internet Service Provider, headquartered in Lansing, Michigan ACD Systems, a computer software manufacturer Advanced Chemistry Development (ACD/Labs), a chemistry software company
Organizations ACD San Marcial, a Spanish football team based in Lardero, La Rioja Adelaide College of Divinity, an Australian theological college African Congress of Democrats, a South African political party Arbeitsgemeinschaft der Christengemeinden in Deutschland (Association of Christian Churches in Germany) Asia Cooperation Dialogue, an international organization Asiatic Cavalry Division, a White Army unit that fought in the Russian Civil War Centre Right Alliance (Romania) (), a political alliance Australasian College of Dermatologists, a medical specialist college
People Arthur Conan Doyle, creator of Sherlock Holmes
Science and healthcare ACD (gene), protein encoded by the ACD gene α-Cyclodextrin, a glucose polymer Alveolar capillary dysplasia, disorder of the lung Anemia of chronic disease, form of anemia Aragonite compensation depth, a property of oceans Allergic contact dermatitis, form of contact dermatitis
Technology Activity-centered design, design based on how humans interact with technology Anti-collision device, on Indian railways Apple Cinema Display, a line of monitors Automatic call distributor, device that directs incoming phone calls Average call duration, average length of telephone calls
Other uses ACD (album), a 1989 album by Half Man Half Biscuit Adjournment in contemplation of dismissal, court ruling to defer the disposition of a defendant's case Antecedent-contained deletion in grammar Activity cycle diagram, a systems modelling paradigm Alcides Fernández Airport in Acandí, Chocó Department, Colombia (IATA code ACD) Autoregressive conditional duration, a class of models used in financial econometrics Kyode language (ISO 639-3 code), a Guang language of Ghana Australian Cattle Dog, a breed of herding dog