[2] Paper 1 does not , however, use the term cooperative prototyping; this term was introduced after Paper 1 was revised for publication.

[3]DUE courses are offsprings of the DUE project described in section 3.1.

[4]Read Only Memory.

[5]Management Information Systems Quarterly.

[6]Horizontal prototyping according to Floyds framework.

[7]Usually called state-transition diagrams.

[8]A data dictionary is a database containing information about declarations of data elements, data flow, and program modules.

[9]All trade marks are acknowledged.

[10]This book is a selection of papers from the 1985 Århus Conference entitled: " Development and Use of Computer-Based Systems and Tools - in the Context of Democratization of Work".

[11]The term design is used in a broad sense here.

[12]CHI conferences started in 1983??

[13]See (Smith, Irby, Kimball, Verplank, & Harslem, 1982).

[14]The chapter on Cooperative Prototyping here is authored by Bødker & Grønbæk (1991).

[15]The Participatory Design conference was arranged to take place in the weekend before the much larger CHI '90 conference, aiming at having the special interested HCI researchers attending both.

[16]See section 2.2 for an introduction of the terms horizontal and vertical prototypes.

[17]WYSIWYG = "What You See Is What You Get" a principle introduced in the design of the Star User Interface (Smith, Irby, Kimball, Verplank, & Harslem, 1982).

[18](Conklin, 1987; Bannon & Grønbæk, 1989).

[19]In HyperCard.

[20]See (Shneiderman, 1983) for an introduction to the direct manipulation concept.

[21]All trade marks are acknowledged.

[22]For instance, this is the case with MIMER's relational DBMS. MIMER is a trade mark by MIMER Information Systems AB, Sweden.

[23]For instance, this is the case with OMNIS 5. OMNIS 5 is a trade mark of Blyth Software, England.

[24] Trade mark by Apple Computer. See e.g. (Goodman, 1987) for an introduction to HyperCard.

[25]Prograph is a trade mark of Gunakara Sun Systems, Canada.

[26]See (Conklin, 1987) for an introduction and a survey of hypertext facilities.

[27]These activities were taking place as follow-up activities to the DUE-project funded by the Danish Office Workers' Union (HK).