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)

(Main list of acronyms)


A0–9[edit]

  • A1C – Airman First Class
  • A2ATD or A2ATD – (i) Anti-Armour Advanced Technology Demonstration
  • A2C2 or A2C2 – (i) Army Airspace Command and Control
  • A4 – many, including a European standard office paper size; see entry
  • A10 – (i) Atlantic 10 Conference

AA[edit]

AB[edit]

AC[edit]

[edit]

AE[edit]

AF[edit]

AG[edit]

AH[edit]

AI[edit]

AJ[edit]

AK[edit]

AL[edit]

AM[edit]

AN[edit]

AO[edit]

AP[edit]

AQ[edit]

AR[edit]

AS[edit]

AT[edit]

AU[edit]

  • Au – (s) Gold (Latin Aurum)
  • AU – (i) African Union (was OAU before 2000) – American University – (s) Astronomical UnitAustralia (ISO 3166 digram) – Austria (FIPS 10-4 country code)
  • 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)
  • 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[edit]

AW[edit]

AX[edit]

AY[edit]

AZ[edit]