Document Type

Technical Report

Publication Date

1986-06-01

Filename

WUCS-86-6.pdf

Technical Report Number

WUCS-86-06

Abstract

A visual language Show and Tell is introduced as a programming language for home information systems, integrating the computer capabilities of managing computation, communications, and database. It is shown that keyboardless programming is possible with Show and Tell. The language is implemented on the Apple Macintosh personal computer. The semantic model of the language is based on the concepts of dataflow and completion. A Show and Tell program is a partially ordered set of nested boxes and arrows. Traditional programming constructs such as subroutine, iteration, record structure recursion, exception, concurrency and so forth, are represented by two-dimensional graphical structures of boxes and arrows. The design philosophy, conceptual model, syntax, and semantics of major language constructs are described. Various research problems in the visual programming area are discussed.

Comments

Permanent URL: http://dx.doi.org/10.7936/K7G44NP9

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