Gordon Bell and Allen Newell edited wrote "Computer Structures: Readings and Examples" 1971, which is a collection of original technical papers and their commentary on significant computers. It is online at: http://research.microsoft.com/en-us/um/people/gbell/Computer...

With Daniel P. Siewiorek, they revised the book in 1982 as "Computer Structures: Principles and Examples" with new material, it is online at: http://research.microsoft.com/en-us/um/people/gbell/Computer...

There are lots of inexpensive copies of the books available at used book sites or Amazon. All of Gordon Bell's publications are at: http://research.microsoft.com/en-us/um/people/gbell/Pubs.htm

In 2011, Ron Mak taught a course at San Jose State University: CS 185C: The History of Computing. He invited a number of famous experts to speak to the class, including Bell, Knuth, Kay, Gosling, Feigenbaum, Alcorn, etc. (I am certainly not famous; I gave a lecture on the HP-35 and other early pocket calculators). http://www.cs.sjsu.edu/~mak/CS185C/

There are a lot of links to papers and other videos. The textbook used in the class was "A History of Modern Computing, 2nd edition" by Paul E. Ceruzzi

Visit the Computer History Museum in Mountain View, CA, Paul Allen's Living Computer Museum in Seattle, WA (computers that still run), and London's Science Museum.