The 8th ERCIM Workshop User Interfaces for All was held in Vienna, Austria, on 28 29 June 2004, building upon the results of the seven previous workshops held in Heraklion, Crete, Greece, 30 31 October 1995; Prague, Czech Republic, 7 8 Nov- ber 1996; Obernai, France, 3 4 November 1997; Stockholm, Sweden, 19 21 October 1998; Dagstuhl, Germany, 28 November 1 December 1999; Florence, Italy, 25 26 October 2000; and Paris (Chantilly), France, 24 25 October 2002. The concept of User Interfaces for All targets a proactive realization of the - signforall...