A Loot System is any method to distribute items amongst a group of players. Whenever two or more players share some reward, they participate in a loot system, even if it's only the default roll system from Blizzard. Frequently, the terms DKP and "loot system" are used interchangeably, because DKP based systems are the most widely used type of formal loot systems, however others such as EPGP and Suicide Kings do exist.
A Loot System is any method to distribute items amongst a group of players. Whenever two or more players share some reward, they participate in a loot system, even if it's only the default roll system from Blizzard. Frequently, the terms DKP and "loot system" are used interchangeably, because DKP based systems are the most widely used type of formal loot systems, however others such as EPGP and Suicide Kings do exist.