Since 2003 Brigitte Ammer and Birgit Kerber have been working together under the name "abk." Among other things, they they jointly led from 1999 to 2014 the graphic design class at the Vienna School of Art.
Brigitte Ammer, born 1955 in Telfs/AT. Studied at the University of Applied Arts in Vienna, graduated 1978.
Birgit Kerber, born 1964 in Feldkirch/AT. Studied at the Wiener Kunstschule (Vienna Art School), 1989 diploma degree.