PPC vs. PPC it just depends on the sanctioning body.
NRA PPC: Police Pistol Combat
Internationally: Precision Pistol Competition

"Precision Pistol Competition, originally and still known as Police Pistol Combat in North America, is a shooting sport focusing on precision shooting from a variety of stances at varying distances, including shooting from behind an obstacle. The competition seeks to create a measure of similarity to real world situations, and is considered one of the forerunners of practical shooting. World Association PPC 1500 is the international governing body of PPC."

Google is your friend!

Smiles,