ABCD 2170 205200791 2008-04-12T21:35:13Z Legare 1693276 '''ABCD''' is a list of the first four letters in the [[English alphabet]]. It may also refer to: In '''medicine''': * [[ABC (medical)]], also known as ABCD, a mnemonic for steps in resuscitation * [[ABCD rating]], a staging system for prostate cancer * [[ABCD syndrome]], a genetic disorder * [[ABCD guideline]], a heuristic for detecting melanomas In '''science''': * [[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 In '''other fields''': * [[Access to Biological Collections Data]], an [[XML]] schema for storing and sharing life science specimen data * [[CompTIA]], also known as the Association of Better Computer Dealers * [[ABCD Region]], an industrial district outside of São Paulo, Brazil * [[American-Born Confused Desi]], refers to American youth of South Asian descent. ** [[ABCD (film)]], film about growing up in New York as a first or second generation South Asian American * [[Asset-Based Community Development]], a methodology that seeks to uncover and highlight the strengths within communities * [[USS Atlanta (1884)|USS Atlanta]], [[USS Boston (1884)|USS Boston]], [[USS Chicago (1885)|USS Chicago]], and [[USS Dolphin (PG-24)]], the first four steel ships built during the "[[History_of_the_United_States_Navy#The_.22New_Navy.22|New Navy]]" period of U.S. Naval history {{disambig}} [[fr:ABCD]]