These are the MaNGOS Servers. Each server is capable of hosting a different expansion. Zero is vanilla, One is Burning Crusade, Two is Wrath of the Lich King, Three is Cataclysm, and Four is Mysts of Pandaris. World of Warcraft, and all World of Warcraft or Warcraft art, images, and lore are copyrighted by Blizzard Entertainment, Inc.