Let's talk about the HP-9000 as depicted in http://www.typewritten.org/Media/Images/hpwindows-starbase-u...
There is a `man` entry displayed in a terminal window there. The first Unix I've ever touched was HP-UX on an HP-9000 (server series, not the workstation one), and I have this memory that the underlined words you can see in that manpage as well were actually hyperlinks you can select and would bring you to the relevant section of the manpage that discussed that term. Am I fabricating that memory or is it real? I cannot find any info about it on the Internet.