Mittersill  south of Salzburg  to  Schwechat  east of  Vienna  and from  Passau  on the pre-war Austro-German border to the  Loibl Pass  on the border with  Yugoslavia . The sub-camps were divided into several categories, depending on their main function:  Produktionslager for factory workers,  Baulager  for construction,  Aufräumlager  for cleaning the rubble