ABCD is a list of the first four letters in the English alphabet. It may also refer to:
Film
ABCD (film), a 2005 Indian Tamil-language romance film
ABCD: American Born Confused Desi (disambiguation), various Indian films so titled ABCD: Any Body Can Dance, a 2013 Indian Hindi-language dance-drama film by Remo D'Souza ABCD 2, its 2015 sequel film by D'Souza
Medicine
ABC (medicine), also known as ABCD, a mnemonic for steps in resuscitation
ABCD rating, a staging system for prostate cancer
ABCD syndrome, a genetic disorder
ABCD1, a protein
ABCD2 score, a score for determining the risk of stroke after a transient ischemic attack
Science
ABCD Schema, a highly structured data exchange and access model for taxon occurrence data (specimens, observations, etc. of living organisms) ABCD matrix analysis, a type of ray tracing technique used in the design of some optical systems ABCD-parameters, a type of properties describing the electrical behavior of linear electrical networks
Other uses
ABCd, American streaming service
Action for Boston Community Development, a Boston, Massachusetts-based non-profit social services agency Asset-based community development, a methodology that seeks to uncover and highlight the strengths within communities Association of Better Computer Dealers, former name of CompTIA, an American non-profit trade association ABCD Region, an industrial district outside of São Paulo, Brazil American-Born Confused Desi, informal term for South Asian Americans born or raised in the United States ABCD: add, browse, change, delete, another representation of create, read, update and delete ABCD line, a Japanese term for embargoes placed against Japan by the Americans, British, Chinese and Dutch, as well as other countries ABCD ships, the first four steel ships built during the "New Navy" period of U.S. Naval history - USS Atlanta, Boston, Chicago and Dolphin Four major agriculture commodity companies Archer-Daniels-Midland Bunge Cargill Louis Dreyfus