YP

YP may be
*Yellow Pages (computing)
*the US Navy hull classification symbol for Training Patrol Craft
*Young Professional, also known as a Yuppie.
*Yepp player names (such as YP-55)
*Videoplatform YouPorn
*Yellow Pikmin, a version of a Pikmin that appears in Pikmin, Pikmin 2, and Super Smash Bros. Brawl