Panels, Tools, and Views (PTV) is a conceptual framework for providing a visual programming environment. This framework seeks to map programming language API to various GUI components in the visual environment. Just as GUIs have allowed people to work in a wide variety of domains without having to write text-based programs to accomplish their tasks, the PTV framework seeks to lessen the effort needed for people to write computer programs.

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Spale, A., Panels, Tools and Views: A Framework for Visual Programming, Master of Science in Computer Science, University of Illinois at Chicago, December 1st, 2002.