English abbreviations from pk to pkp
- PK ((catalog) Perek-Kohoutek, a catalog of planetary nebulae)
- P.K. (Pridie Kalendas ("The day before the Calends"))
- PKA (Napaskiak Airport)
- PKAN (Panthothenate kinase-associated neurodegeneration)
- PKB (Mid-Ohio Valley Regional Airport)
- PKC (Yelizovo Airport)
- PKCS (Public Key Cryptography Standards)
- PKD (Park Rapids Municipal Airport (Konshok Field))
- PKDF (Polycystic Kidney Disease Foundation)
- PKE (Partnership of Kindermusik Educators [1] &[2] & [2])
- PKF (Park Falls Municipal Airport)
- PKG (Package)
- PKG-POL (Packaged Petroleum, Oils, and Lubricants)
- PKH (Porto Cheli Airport)
- PKI (Public Key Infrastructure (cryptography))
- PKK (Player Killer Killer)
- PKM (Pulemet Kalashnikova Modernizirovanniy (Russian ПКМ пулемет Калашникова модернизированный, "Machinegun Kalashnikov Modernised")[1])
- PKMS (Pulemet Kalashnikova Modernizirovanniy Stepanova (Russian ПКМС пулемет Калашникова модернизированный Степанова, "Machinegun Kalashnikov Modernised Stepanova")[1])
- PKMT (Pulemet Kalashnikova Modernizirovanniy Tankoviy (Russian ПКМТ пулемет Калашникова модернизированный танковый, "Machinegun Kalashnikov Modernised Tank") (a.k.a. PKTM[1]))
- PKO (Parakou Airport)
- PKP (Pi Kappa Phi Fraternity)