World of Greyhawk

World of Greyhawk is an ambiguous term. It can refer to:


 * the Greyhawk campaign setting
 * The World of Greyhawk Fantasy World Setting from 1980
 * the World of Greyhawk Fantasy World Setting boxed set from 1983
 * the planet Oerth, the world upon which the Free City of Greyhawk and the whole Greyhawk campaign setting are placed