Selections from Wikipedia
The next project after making school lectures in maths and physics was to learn from Wikipedia. On paper you don't get distracted by chasing links.
This led to a selection of printed Wikipedia articles that were put in special folders in custom made archive furnitures. The PRINTS menu leads to a list of these articles.
The work led to a feeling of déjà vu. Many years ago I used a program called Linkman that forms a database from selected links.
The LINKS menu leads to a list of Wikipedia links from that program.