Via Slashdot, 55 operating systems on a Powerbook is quite awesome. I love the notes on getting Inferno to run:
Even though Inferno 4th Edition includes Mac OS X as a host system, it has issues on Panther. It is simplest to run it within Linux within Virtual PC within Mac OS X.
The article brought me back to the early DOS days among other things. I have a copy of DOS 2.1 on a few 5-1/4 floppies somewhere…