- 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"))
