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  1. ACAC (China)
  2. Aceair (Switzerland)
  3. ADA (India)
  4. Adam (United States)
  5. ADI (United States)
  6. Aerion (United States)
  7. Aermacchi (Italy)
  8. Aero AT (Poland)
  9. Aero Mercantil (Colombia)
  10. Aero Services (France)
  11. Aero Vodochody (Czech Republic)
  12. Aero-Volga (Russia)
  13. AeroAndina (Colombia)
  14. Aerocomp (United States)
  15. AeroCourier (United States)
  16. Aerodynos (Colombia)
  17. AeroJames (France)
  18. AeroKuhlmann (France)
  19. Aerolites (United States)
  20. Aeromot (Brazil)
  21. Aeronix (France)
  22. Aeroprakt (Russia)
  23. Aeroprakt (Ukraine)
  24. Aeros (Czech Republic)
  25. Aerostar (Romania)
  26. Aerostar (United States)
  27. Aerostyle (Germany)
  28. Agrolot (Poland)
  29. AIDC (Taiwan)
  30. AII (Iran)
  31. AIR (United States)
  32. Air Tractor (United States)
  33. Airbus (International)
  34. Airbus Military (International)
  35. Aircorp (Australia)
  36. AirLony (Czech Republic)
  37. AirMax (Brazil)
  38. Airox (Czech Republic)
  39. Airsport (Czech Republic)
  40. Airstart (Canada)
  41. Airtech (International)
  42. Albatross (Russia)
  43. Alenia (Italy)
  44. Alpaero (France)
  45. Alpha (Poland)
  46. Alpi Aviation (Italy)
  47. AMD (United States)
  48. AMF (United Kingdom)
  49. American Champion (United States)
  50. American Homebuilts (United States)
  51. Ameur (France)
  52. AMS-Flight (Slovenia)
  53. AMX International (International)
  54. Andreasson (Sweden)
  55. Angel (United States)
  56. Antonov (Ukraine)
  57. Aquastar (United States)
  58. Aquila (Germany)
  59. Association Zéphyr (France)
  60. ATEC (Czech Republic)
  61. ATG (United States)
  62. Atlas (United States)
  63. ATR (International)
  64. AUC (United States)
  65. Avantage (Russia)
  66. AvCraft (Germany)
  67. Avia (Russia)
  68. AviaBellanca (United States)
  69. Aviat (United States)
  70. Aviation Development (United States)
  71. Aviation Enterprises (United Kingdom)
  72. Avid (United States)
  73. Avioane (Romania)
  74. AviPro (United States)
  75. Avocet (United States)