I have learned unix with sunOs in 1990. Man pages were excellent. The first command I learned was "man man". There was a paper version of the man pages available in the computer room (among many other sun documentations). I became pissed by man pages only when I switched to linux. At that time, I have discovered the crypt(3) command by looking at the index of man pages. One week later, I had cracked 10% of passwords of the school (creating my own dictionary).