HASAG(Hugo Schneider Aktiengesellschaft-Metalwarenfabrik, Leipzig), one of the privately owned German industrial companies that used concentration camp prisoners to manufacture armaments. HASAG was the third largest after I.G. Farben and the Hermann Goring Werke.
HASAG operated four camps in Czestochowa, Poland. The largest, HASAG-Apparatexbau held seven thousand Jewish prisoners. In general, the policy of Vernichtung durch Arbeit ("extermination through work") was applied. Selections were held when those no longer fit for work were killed. From July 1944 to early 1945, HASAG transferred most of its equipment and Jewish workers to Germany. HASAG personnel were put on trial by the Allies in the later Nuremberg proceedings.
Source: Encyclopedia of the Holocaust.