- AKJ(Asahikawa Airport)
- AKJM(Archbishop Kavukatt Jubilee Memorial)
- AKK(Akhiok Airport)
- AKL(Auckland Airport)
- AKM(Zakouma Airport)
- AKMS(Army Key Management System)
- AKN(King Salmon Airport)
- AKNLDG(AcKNowLeDGe Message)
- AKO(Colorado Plains Regional Airport)
- AKP(Anaktuvuk Pass Airport)
- AKQ(Gunung Batin Airport)
- AKQJ(Ace, King, Queen, Jack)
- AKQJT(Ace, King, Queen, Jack, Ten)
- AKR(Akure Airport)
- AKRAOC(Alaska Region Air Operations Center)
- AKS(Auki Gwaunaru'u Airport)
- AKSA(Aviation Storekeeper Seaman Apprentice)
- AKSN(Aviation Storekeeper Seaman)
- AKST(Alaska Standard Time (UTC-9 hours))
- AKT(RAF Akrotiri)
- AKU(Aksu Airport)
- AKV(Akulivik Airport)
- AKX(Aktobe Airport)
- AKY(Sittwe Airport)
- AKYSB(Aga Khan Youth and Sports Board)
- aL(Attolitre)
- al.(alii, alibi, alias ("others", "elsewhere", "otherwise"))
