IBM Systems Journal - 2002 Copyright

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IBM Journal of Research and Development  
Volume 15, Number 2, Page 155 (1976)
Nontopical Issue
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Top-down development using a program design language

by P. Van Leer
Discussed is a program design language—a form of pseudocode—that has been developed and used to organize, teach, document, and develop software systems. An example of top-down program design illustrates the key steps in using the language: determining the requirements, abstracting the functions, expanding the functions, and verifying the functions. Syntax and conventions of the language are given in an appendix.
Related Subjects: Languages; Programming