Several years ago I bought a used Miyata 912 (orange) from around 1979 or 80 with Shimano 600EX (Arabesque) components. Just recently I tore it down to restore it. The rear hub and cassette body are one, which I understand is the first generation Shimano Uniglide (no hump on drive side of hub).

Being stuck in the late 1960's and 70's, I have only used freewheels, this is my first experience with a cassette type hub so I know nothing about them.

It would be nice to know a sort of timeline of cassette/free-hub models and types. What's obsolete, what's currently available and interchangeability of brands.