PowerPC Solaris on the RS/6000
If you get access to an IBM RS&#x2F;6000, another thing to play around with on it is the original AIX operating system.<p>Imagine a Unix that got an IBM working-over.  When the RS&#x2F;6000 workstations first came out, AIX was a big contrast to the more seat-of-pants workstation Unix of SunOS 4 (this was before Solaris 2).<p>Some of the AIX changes weren&#x27;t only enterprise-y server management OS abstractions, but fun: AIX included a nice GUI hypertext browser for its documentation, in 1990 (possibly earlier).