 Six camps meet this definition, though extermination of people happened at every sort of concentration camp or transit camp; the use of the term extermination camp with its exclusive purpose is carried over from Nazi terminology.The six camps were Chelmno extermination camp, Belzec extermination camp, Sobibor extermination camp, Treblinka extermination camp, Majdanek extermination camp and Auschwitz extermination camp (also called Auschwitz-Birkenau).