PKA

{{wiktionary|PKA|pKa}} '''PKA''' may refer to:

* Napaskiak Airport (IATA code), airport in Napaskiak, Alaska * Professionally known as: ** Pen name ** Stage persona * p''K''_a, the symbol for the acid dissociation constant at logarithmic scale * Protein kinase A, a class of cAMP-dependent enzymes * Pi Kappa Alpha, the North-American social fraternity * Public key authentication, establishing key authenticity in public-key cryptography * Professional Karate Association * Primary knock-on atom, an atom that is displaced from its lattice site by irradiation *Painkiller Already, a podcast featuring FPSRussia *Pentax K_A-mount, a camera lens mount

== Non-Latin == *The Latin letters ''PKA'' are visually similar to the Cyrillic acronym ''{{Lang|ru|РКА}}'', the Russian Federal Space Agency

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