Here’s a discussion of force diagrams as used in physics.
See Knuth (1984) for additional discussion of literate programming.
See Meadows (2008) for systems primer. See Simon (1947) for admin behavior.
Knuth, Donald E. 1984.
“Literate Programming.” Comput. J. 27 (2): 97–111.
https://doi.org/10.1093/comjnl/27.2.97.
Meadows, Donella. 2008. Thinking in Systems: A Primer. Vermont: Chelsea Green Publishing.
Simon, Herbert. 1947. Administrative Behavior. Macmillan.