The originating impetus for this workshop came from an organising committee of the Centre for Theoretical Computer Science at the University of Leeds. The committee consisted of Tony Cohn (Chair) agc@scs.leeds.ac.uk John Derrick pmt6jd@gps.leeds.ac.uk Pat Hill hill@scs.leeds.ac.uk Gyuri Lajos gyuri@scs.leeds.ac.uk Mark Tarver mark@scs.leeds.ac.uk The early stages of planning this workshop was performed by a Technical Organising Committee consisting of Alan Frisch (Chair) University of York email: frisch@minster.york.ac.uk phone: +44 (904) 432745 fax: +44 (904) 432767 Alan Bundy University of Edinburgh email: bundy@edinburgh.ac.uk phone: (031) 650-2716 fax: (031) 650-6516 Tony Cohn University of Leeds email: agc@scs.leeds.ac.uk phone: (0532) 335482 fax: (0532) 335468 Dov Gabbay Imperial College email: dg@doc.lc.ac.uk phone: (071) 225 8447 fax: (071) 581 8024 Alan Frisch (York) served as Programme Chair, Craig MacNish (York) served as publicity chair and Antonis Kaniclides (York) provided administrative assistance.