9/7/2026
The code for Deriver and Derivation Planner was written for the Mac around 1988 by Martin Frické using THINK Pascal. Those applications were published in 1989. Martin Frické, their author, variously converted these to different host environments. Somewhat more recently, around 2008 and later, those conversions were to java applications and applets, and to javascript widgets. Often the Google Web Toolkit (GWT) was used to compile java to javascript. Almost all of these projects have been 'open-sourced' and are available free on GIT.
In 2025-2026, the author became aware of the power and capabilities of AI coding assistants, such as Claude Code. This opened the possibility of tidying up some outstanding work in making logic instruction widely available. At present that means widely available through web browsers. For this Endorsement game project, the author acknowledges, and warmly thanks, Claude Code and Anthropic:
"Software implementation, debugging, and testing of the browser-based exercises were carried out with the assistance of Claude (Anthropic), an AI coding assistant, under the author's direction."