I find it amusing that one of the sections has "Electronic slide rule" in the title. I guess that was the reference mark to beat at the time.

The YouTube channel of "Professor Herning" has some good videos if one is curious on slide rules:

* https://www.youtube.com/c/ProfessorHerning/videos

Both their use:

* https://www.youtube.com/c/ProfessorHerning/playlists

and comparisons between different models. There's a still lively trade for them on eBay that seems to go on for aficionados and the curious.