A generalized technique for symbol manipulation and numerical calculation
Communications of the ACM
Recursive functions of symbolic expressions and their computation by machine, Part I
Communications of the ACM
Sketchpad: a man-machine graphical communication system
AFIPS '63 (Spring) Proceedings of the May 21-23, 1963, spring joint computer conference
Sketchpad III: a computer program for drawing in three dimensions
AFIPS '63 (Spring) Proceedings of the May 21-23, 1963, spring joint computer conference
Sketch pad a man-machine graphical communication system
DAC '64 Proceedings of the SHARE design automation workshop
On-Line Simulation of Block-Diagram Systems
IEEE Transactions on Computers
An outline of the requirements for a computer-aided design system
AFIPS '63 (Spring) Proceedings of the May 21-23, 1963, spring joint computer conference
Sketchpad: a man-machine graphical communication system
AFIPS '63 (Spring) Proceedings of the May 21-23, 1963, spring joint computer conference
Magic: a machine for automatic graphics interface to a computer
AFIPS '65 (Fall, part I) Proceedings of the November 30--December 1, 1965, fall joint computer conference, part I
AFIPS '64 (Spring) Proceedings of the April 21-23, 1964, spring joint computer conference
AFIPS '66 (Fall) Proceedings of the November 7-10, 1966, fall joint computer conference
AFIPS '66 (Fall) Proceedings of the November 7-10, 1966, fall joint computer conference
A compact data structure for storing, retrieving and manipulating line drawings
AFIPS '67 (Spring) Proceedings of the April 18-20, 1967, spring joint computer conference
Multi-function graphics for a large computer system
AFIPS '67 (Fall) Proceedings of the November 14-16, 1967, fall joint computer conference
The case for a generalized graphic problem solver
AFIPS '70 (Spring) Proceedings of the May 5-7, 1970, spring joint computer conference
A computer-aided linkage analysis system
IBM Systems Journal
Interactive graphics in data processing: principles of interactive systems
IBM Systems Journal
Information Sciences: an International Journal
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A Computer-Aided Design System for general use must have a unique and powerful organization. Even the simplest of design problems involves the exercise of many disciplines and the carrying out of many types of activity. Since the area of applicability of the design system is to be essentially unlimited, we know from the beginning that the system itself must be very large and complex. Even though only a few of its features may be exercised on any given design problem, there is no way of predicting which portions of the system will be required nor how they will be used. Furthermore the designer or engineer who is using the system cannot be expected to be a computer programmer, and it must be possible for him to carry out his design function in a way which is natural to him, and without his being aware that the statements and actions that he performs are in fact constructing and executing large numbers of highly complex computer programs. Although to be sure the user must learn and become facile with the basic vocabulary and manipulations of the system, the system must be so designed that he finds his normal thought processes aided, augmented, and stimulated by the use of the system in such a way that he is able to think almost entirely at the concept level within his own field of interest, while at the same time carrying out data processing activities of extreme complexity.