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, USS Boston, USS Chicago, and USS Dolphin (PG-24), the first four steel ships built during the "New Navy" period of U.S. Naval history
* American, British, Chinese, Dutch - the main powers opposing the Empire of Japan prior the Pacific War in World War II

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Look at other dictionaries:

  • ABCD — puede referirse a: ABC Paulista, una región industrial de Brasil. ABCD, un suplemento cultural del diario ABC de España. Esta página de desambiguación cataloga artículos relacionados con el mismo título. Si llegaste aquí a través de …   Wikipedia Español

  • ABCD — Cette page d’homonymie répertorie les différents sujets et articles partageant un même nom.   Sigles d’une seule lettre   Sigles de deux lettres   Sigles de trois lettres > Sigles de quatre lettres …   Wikipédia en Français

  • ABCD — A.B.C.D. or ABCD (no periods), Accelerated Business Collection and Delivery (a system employed by the United States Postal Service) …   Useful english dictionary

  • ABCD — abbreviation accelerated business collection and delivery …   New Collegiate Dictionary

  • ABCD — Asset Based Community Development (Community) ** American Born Confused Desi (Miscellaneous » Funnies) * Access To Baby And Child Dentistry (Medical » Physiology) * Above and Beyond the Call of Duty (Governmental » US Government) * Above and… …   Abbreviations dictionary

  • ABCD — airway, breathing, circulation, differential diagnosis (or defibrillate) [in cardiopulmonary resuscitation]; amphotericin B colloidal dispersion; appropriate blood pressure control in diabetes; asymmetry, borders are irregular, color variegated,… …   Medical dictionary

  • abcd — (a bé sé dé) s. m. Se dit quelquefois pour ABC …   Dictionnaire de la Langue Française d'Émile Littré

  • ABCD — Add Binary Coded Decimal (Assembler Anweisung) …   Acronyms

  • ABCD — Adriamicina, bleomicina, CCNU (lomustina) y dacarbacina, quimioterapia …   Diccionario de siglas médicas y otras abreviaturas

  • abcd — Inglish (Indian English) Dictionary American Born Confused Desi; a pejorative term for 2nd generation Indians in U.S.A …   English dialects glossary

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