My first time on the internet was on HP-UX machines at my mom's work (BNR or Bell Northern Research - a large telecom research department that was one of the eventual precursors to Nortel). She often had to work weekends and would haul my brother and me in, where we'd surf the early 1990s internet or play netrek, so I have a soft spot for it.

I admin'd some HP-UX machines for a hot minute in the early 2000s. It pretty much cancelled out any goodwill, but I do sometimes think back with nostalgia for the workstations.