The IBM 1401 mainframe runs "Edith"

While much more on the technical side of things, both Ken Shirriff and Curious Marc are great resources for a lot of the historical and technical aspects of things. I'd highly recommend both of them for looking at specific topics of how the computing hardware worked: - Marc's videos on old HP computers, [link] - Marc's videos on restoring some old IBM hardware, that includes a good bit of the history that went into them, [link] and [this video] - In fact just look at his playlists directly, [link] For Ken, I'd look at his chip teardowns and explorations, the AM2901 is on HN this very moment, [link] A lot of his articles dig into why the different chip technologies were made and fell out of favor eventually too. [link]