Believe it or not, Microsoft has Microsoft World 5.5 for MS-DOS as a downloadable program on their website. I came across it several months ago just out of pure chance. The copyright date for this program is believe it or not, 1990! This program is 20 years old folks. I've tested it out in DOSBox a few times and it's pretty darn neat. It's one of those older programs with the solid blue background. Classic.