On the cards of former concentration camp inmates, the prisoner categories that had been assigned to them in the German concentration camps were noted - such as "SV", "BV", "Bifo" or - as in this example - "Polit." for "political prisoners", which also included the DPs who were persecuted as Jews until 1945.

Around a third of the index cards do not refer to former concentration camp prisoners, but to prisoners of war, forced labourers and the civilian Austrian staff (nurses, kitchen staff) of the DP camp.