A State Transition Diagram Language for Visual Programming

objects have been devdloped. The diagrams, flowcharts, and other iconic representations we have long employed to communicate with other people can now be used directly to describe algorithms to computers. With the availability of graphics-based, personal workstations, these visual modes can eliminate the need to convert algorithms to the linear strings of symbols traditionally required by most computers. Linear, symbolic computer languages have been studied and refined extensively over the past 30 years, but computer language designers now face a new challenge: to provide convenient and natural visual programming lan-

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