Abstract
Most user interface designers are conversant with graphical user interface (GUI) tools such as Motif 1 1 Motif is a trademark of Open Software Foundation Inc. and Presentation Manager 2 2 Presentation Manager is a trademark of IBM. which provide ‘widgets’ and other facilities for building user interfaces. Such GUI tools were developed primarily for building interfaces to single-user systems. The purpose of the paper is to present the result of research into the requirements for GUI tools for multi-user systems. Many of the requirements of single and multi-user GUIs are the same, for example, usability and flexibility. A number of new widgets are needed for multi-user GUIs, for example, shared scroll-bars and multi-user telepointers. The requirements are divided into three groups based on three sources of requirements: literature, user survey and widgets.
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