By the way, on the subject of good books, Bell &
Newell, "Computer structures: readings and examples" is very good. It
categorizes computers a number of different ways, and covers a range of examples touching
on most of the categories. The Google search mentions an authorized online copy at Gordon
Bell's website:
https://gordonbell.azurewebsites.net/cgb%20files/computer%20structures%20re…
And here is the table of contents:
https://ed-thelen.org/comp-hist/bell-71-t-o-c.html
Apparently there is a second edition. I'm pretty sure I have the first edition.
The second edition is:
Computer Structures: Principles and Examples by Siewiorek, Bell, and Newell (1982). Gordon
Bell uploaded it to: