🖙Achtung Spinne!
I was reading some German Pascal books from the 80s on Internet Archive, as one does, and i found one that has very crude but very charming images.
For example, there's some code in the book to draw a sign forbidding entry of pests ("Kein Zutritt für Ungeziefer") and one warning of spiders ("Achtung Spinne!")
And here's an image with just a fuckton of ants
The little icons for different callouts seem to be produced in a similar style, if not literally using Turbo Pascal on Windows:
Labels read source code and description, usage example, additional notes, and variation suggestions. They also have the labels: "How will this be cooked?", "How will this be served?", "Warning!", and "How would this be seasoned?"
The cover is also great, albeit not one produced with the techniques inside the book:
"Title reading 100 Grpahics Recipes for Turbo Pascal on Windows" with "Programmer tips with extras for beginners and the experienced" as a message in the corner.