'''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 '''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]], an ethnic slur that 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

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[[rmy:ABCD]]