Almost 20 years ago, some heathen compatriots and I worked hard to create absurdly baroque DOS prompts with ANSI.SYS and, inevitably, larger-than-normal environment memory on pre-Windows systems. I wish I had a copy of the PROMPT command used to create my own version of that monstrosity — it danced the cursor around to put the current path at the top of the screen, the date in the corner, yadda yadda yadda.

It turns out, people still do this sort of thing on unixy systems.