History, state and future of user interface management systems
ACM SIGCHI Bulletin
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The design of HutWindows, a user interface management system intended for applications in mechanical CAD, is discussed,. HutWindows features a three-layered internal architecture, where the presentation, dialogue-control, and application-processing layers are clearly separated from each other. This leads to increased simplicity and flexibility in user interface design over the more traditional situation where all of these layers are closely coupled.