[smackeyacky]

You don't see vDOS mentioned much, although my limited understanding is that it's designed to get all those old business oriented DOS apps working (instead of games) i.e. it works with the original version of Wordstar that no longer runs on newer DOSs due to the way file handling works.

It's fascinating to me just how long you can keep old programs going in the modern age. Emulation is such a life saver.