ABCD is a list of the first four letters in the English alphabet. It may also refer to: Film ABCD (film), a 2005 Tamil romance film ABCD 2, a 2015 Indian dance film ABCD: American-Born Confused Desi (2013 film), a 2013 Malayalam comedy film ABCD: American Born Confused Desi (2019 film), a 2019 Telugu drama film ABCD: Any Body Can Dance, a 2013 Bollywood film 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