AAA might be an acronym or abbreviation for:
  1. American Automobile Association
  2. Analog/Analog/Analog (audio CD format, recording/mixing/mastering)
  3. Anti-Aircraft Artillery
  4. Abdominal Aortic Aneurysm
  5. Access All Areas (Sony music project)
  6. Access Approval Authority
  7. Accumulated Adjustments Account (US Federal Income Tax)
  8. Aces of ANSI Art
  9. Acquisition Approval Authority
  10. Action Awareness Alert
  11. Adaptive Array Antenna
  12. Adjust for ASCII Addition (X86)
  13. Administration, Authorization, and Authentication (Software Security)
  14. Advanced Acoustic Array
  15. AEGIS Acquisition Agent
  16. Aerospace Engineering, Applied Mechanics, and Aviation
  17. Against All Authority (punk band)
  18. Age Anaesthesia Association
  19. Agricultural Adjustment Act of 1933
  20. Agricultural Adjustment Administration
  21. Air Avenue of Approach
  22. Airborne Array Aperture
  23. Airborne Assault Area
  24. Aircraft Alert Area
  25. Airport Airspace Analysis
  26. Alaska Activities Adventures Plus Tours
  27. Album Adult Alternative (radio format)
  28. Allocations, Assessments, and Analysis
  29. Alternate Assembly Area
  30. Amateur Athletics Association
  31. American Academy of Actuaries
  32. American Academy of Addictionology
  33. American Academy of Advertising
  34. American Academy of Audiology
  35. American Accounting Association
  36. American Airlines Arena
  37. American Allergy Association
  38. American Ambulance Association
  39. American Anthropological Association
  40. American Arbitration Association
  41. American Armwrestling Association
  42. American Association of Anatomists
  43. American Audit Associates
  44. Anesthesia Administration Assembly
  45. Angle Angle Angle (geometric proof)
  46. ANSI Artists of America
  47. Anti-Acronym Abuse
  48. Antiaircraft Antiarmor (Weapon)
  49. Anticipative Adaptive Array (frequency-hopping communications)
  50. Antique Airplane Association
  51. Antique Automobile Association
  52. Anygame Anytime Anyplace (gaming clan)
  53. AOES (Advanced Orbital Ephemeris System) Accuracy Assessment
  54. Appraisers Association of America
  55. Area Agency on Aging
  56. Arkansas Ambulance Association
  57. Army Audit Agency
  58. Aromatic Amino Acid
  59. Asociacion Anticomunista Argentina
  60. Assign Alternate Area
  61. Association of Avatar Artists
  62. Astronaut-Actuated Abort
  63. Atheist and Agnostic Association
  64. Attitude, Awareness and Accountability (ski safety program)
  65. Australian Association of Accountants
  66. Australian Automobile Association
  67. Authentication, Authorization and Accounting (Cisco)
  68. Authentication, Authorization, and Accounting
  69. Authorization Accounting Activity
  70. Authorized Accounting Activity
  71. Automated Airlift Analysis
  72. Autoridad de Acueductos y Alcantarillados (Aqueduct and Sewer Authority, Puerto Rico)
  73. Awaiting Aircraft Availability

AAA is also a standard size of dry-cell battery.

AAA is also a league in minor league baseball.