The 8th Ercim Workshop โuser Interfaces For Allโ Was Held In Vienna, Austria, On 28โ29 June 2004, Building Upon The Results Of The Seven Previous Workshops Held In Heraklion, Crete, Greece, 30โ31 October 1995; Prague, Czech Republic, 7โ8 Nov- Ber 1996; Obernai, France, 3โ4 November 1997; Stockholm, Sweden, 19โ21 October 1998; Dagstuhl, Germany, 28 November โ 1 December 1999; Florence, Italy, 25โ26 October 2000; And Paris (chantilly), France, 24โ25 October 2002. The Concept Of โuser Interfaces For Allโ Targets A Proactive Realization Of The โ- Signforallโprincipleinthe?eldofhuman-computerinteraction(hci),andinvolvesthe Developmentof User Interfaces To Interactiveapplicationsand E-services, Which Provide Universalaccess Andusabilityto Potentiallyall Users. In Thetraditionofits Predecessors, The 8th Ercim Workshop โuser Interfaces For Allโ Aimed To Consolidate Recent Work And To Stimulate Further Discussion On The State Of The Art In โuser Interfaces For Allโ And Its Increasing Range Of Applications In The Upcoming Information Society. The Emphasis Of The 2004 Event Was On โuser-centered Interaction Paradigms For Universal Access In The Information Society. โ The Requirement For User-centered U- Versal Access Stems From The Growing Impact Of The Fusion Of The Emerging Techno- Gies And From The Different Dimensions Of Diversity That Are Intrinsic To The Information Society. These Dimensions Become Evident When Considering The Broad Range Of User Characteristics, The Changing Nature Of Human Activities, The Variety Of Contexts Of Use, The Increasing Availability And Diversi?cation Of Information, Knowledge Sources And E-services, The Proliferation Of Technological Platforms, Etc.