There was a space on the medical registration cards to mark the prisoner category to which the sick prisoner belonged. Po stood for political prisoners, B.V. (Berufsverbrecher) for so-called “career criminals” and Aso or AS for anyone the Nazis considered “antisocial.” For non-German prisoners, the prisoner’s nationality was written by hand in this section instead of their category. For example, R stood for Russian, Nor for Norwegian, F for French and P for Polish. There are also very few cards for Soviet prisoners of war which can be identified by the abbreviation Kgf. (Kriegsgefangener). 2,500 to 3,000 Soviet prisoners of war were taken to Gross-Rosen from the end of 1941.