AAA/AA
AAA/AA stands for Airframe Airworthiness Assurance/Aging Aircraft (US NASA)
AA/MM
AA/MM stands for Aeromobili (Italian: airplanes)
AA3
AA3 stands for; AA3 stands for America’s Army 3 (gaming) AA3 stands for Accident Analysis Computer Program
AAAA&I
AAAA&I stands for American Academy of Allergy, Asthma, and Immunology
AA/PI
AA/PI stands for Asian American Pacific Islander (various organizations)
AA&A
AA&A stands for Armor, Armament, and Ammunition
AA-EMT
AA-EMT stands for Associate of Arts in Engineering Management Technology (Grantham University; Kansas City, MO)
AA.VV.
AA.VV. stands for Autori Vari (Italian: Various Authors)
AA(HS)
AA(HS) stands for High School Airman Apprentice
AA-SIG
AA-SIG stands for African American Special Interest Group (St. Louis, MO)