Titlebook: Electronic CAD Frameworks; Timothy J. Barnes,David Harrison,Rick L. Spickelmi Book 1992 Springer Science+Business Media New York 1992 Soft

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Extension Languages,rammatic means were available, Ivan Sutherland’s SKETCHPAD system incorporated the notion of master and instance objects to allow the efficient repetition of a defined set of drawing operations [SUT64].

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User Interfaces,owing a user to concentrate on the task at hand not on the software system itself. Development of such systems can be deceptively difficult. In this section, we highlight some of the problems in constructing user interfaces in the context of large Design Automation Frameworks and some solutions found in state of the art systems.

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Introduction,sistors, can exceed two gigabytes. While the CAD tools themselves are essential to the design process, the management of such vast amounts of data and its presentation, in a useful and efficient form, to CAD programs, to designers, and to manufacturing equipment alike, has become a major issue in the electronics industry.