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List of acronyms: A

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This list contains acronyms, initialisms, and pseudo-blends that begin with the letter A.

For the purposes of this list:

  • acronym = an abbreviation pronounced as if it were a word, e.g., SARS = severe acute respiratory syndrome, pronounced to rhyme with cars
  • initialism = an abbreviation pronounced wholly or partly using the names of its constituent letters, e.g., CD = compact disc, pronounced cee dee
  • pseudo-blend = an abbreviation whose extra or omitted letters mean that it cannot stand as a true acronym, initialism, or portmanteau (a word formed by combining two or more words).
(a) = acronym, e.g.: SARS – (a) severe acute respiratory syndrome
(i) = initialism, e.g.: CD – (i) compact disc
(p) = pseudo-blend, e.g.: UNIFEM – (p) United Nations Development Fund for Women
(s) = symbol (none of the above, representing and pronounced as something else; for example: MHz – megahertz)

Some terms are spoken as either acronym or initialism, e.g., VoIP, pronounced both as voyp and V-O-I-P.

(Main list of acronyms)

A0–9

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  • A1CAirman First Class
  • A2ATD or A2ATD – (i) Anti-Armour Advanced Technology Demonstration
  • A2C2 or A2C2 – (i) Army Airspace Command and Control
  • A3 – many, including a European larger than standard office paper size
  • A4 – many, including a European standard office paper size; see entry
  • A10 – (i) Atlantic 10 Conferencee

AA

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AB

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AC

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AE

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AF

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AG

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AH

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AI

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AJ

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AK

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AL

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AM

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AN

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AO

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AP

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AQ

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AR

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AS

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AT

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AU

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  • Au – (s) Gold (Latin Aurum)
  • AU
  • AUC
    • (i) Ab Urbe Condita / Anno Urbis Conditae (Latin "from the founding of the city" / "in the year since the founding of the city") (of Rome)
    • Area Under the Curve (concentration time curve; medicine)
  • AUD – (s) Australian dollar (ISO 4217 currency code)
  • AUG – (a) Armee-Universal-Gewehr (German, Army Universal Rifle)
  • AUS – (s) Australia (ISO 3166 trigram)
  • AUSCANNZUKUS – (p) Australia, Canada, New Zealand, United Kingdom, United States (security designation)
  • Auslan – (p) Australian Sign Language
  • AUT – (s) Austria (ISO 3166 trigram)
  • AUTL – (i) Army Universal Task List

AV

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AW

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AX

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  • AX – (s) Åland (ISO 3166 digram)
  • AXP – (p) Ambulance eXchange Point

AY

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AZ

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