What does PPK stand for?

PPK stands for Polizeipistole KriminalmoDELL (Police pistol criminal model). Contrary to popular belief, this is not because the Walther PPk is favored by criminals, but because it was issued to German detectives apprehending criminals. Less commonly, PPK stands for Polizeipistole Kurz, referring to the shorter length of the PPK compared to the PP on which it is based.