Amateur Athletic Association.
American Automobile Association.
Automobile Association of America.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Word Origin and History for a.a.a.
also AAA, abbreviation of American Automobile Association, attested 1902, American English, the year the organization was founded.
Online Etymology Dictionary, © 2010 Douglas Harper