Computer Musings by Professor Donald E. Knuth
From the website:
View Computer Musings, lectures given by Donald E. Knuth, Professor Emeritus of the Art of Computer Programming at Stanford University. The Stanford Center for Professional Development has digitized more than one hundred tapes of Knuth’s musings, lectures, and selected classes and posted them online. These archived tapes resonate with not only his thoughts, but with insights from students, audience members, and other luminaries in mathematics and computer science. They are available to the public free of charge.
Knuth brings both clear understanding and expression to every subject he addresses.
Both are essential for a useful topic map.