[Tomte]

The character S also has its own chapter in Knuth's "Digital Typography": https://www-cs-faculty.stanford.edu/~knuth/dt.html

The half-tone chapter is also quite cool.

[dhosek]

I remember when the half-tone article was first published in TUGboat. In those days when scanners were exotic equipment not easily accessible, the illustrations were amazing to see (and to recreate).

[guylepage3]

This is very cool. Thanks for sharing.