What does PK stand for?

What does PK mean?

PK	Port Kembla, New South Wales, Australia Regional » Australian
PK	Preacher's Kid Internet » Chat
pK	Covalent Disassociation Constant Academic & Science » Chemistry
PK	Pink Miscellaneous » Colors
PK	Park Community
PK	Pakistan Internet » Domain Names
PK	Pre-Kindergarten Community » Educational
PK	Perfect Kid Community » Educational
PK	Perrin Kaplan, Vice-President of Nintendo Community » Famous
PK	Pierre Karsmakers, bike racer Community » Famous
PK	Phil Katz, computer programmer, inventor of PKWare Community » Famous
PK	Paul Kocher Community » Famous
PK	Paul Kelly Community » Famous
PK	PharmacoKinetics Governmental » FDA
PK	TeX DVI driver PacKed bitmap font file Computing » File Extensions
PK	Parker Kalon Business » Firms
PK	Pink Kipper Publishing company Business » Firms
PK	Potato Klan Miscellaneous » Funnies
PK	Psycho Kinesis Miscellaneous » Funnies
PK	Pikachu Killer Miscellaneous » Funnies
PK	Pig Kisser Miscellaneous » Funnies
PK	Pretty Krappy Miscellaneous » Funnies
PK	Phrozen Keep Miscellaneous » Funnies
PK	Prozen Knights Miscellaneous » Funnies
PK	Property Key Computing » General