Good grief, seeing someone not know what MS-DOS is, is a bit like someone who doesn't know who Elvis Presley was!. Are these things so soon forgotten? Or am I just getting old? Back, before 1995, when people turned on their computers, after it had started up all you saw was:

A:\ >

The infamous MS-DOS prompt! At this prompt you could type commands like DIR, TYPE, REN, COPY etc. If you wanted to run Windows (Win 3.x in those days) you started it by typing WIN. Once Win95 came out, even though it was a loose fitting "veneer" on top of MS-DOS this was all forgotten though you still got a link to "MS-DOS command" that would start a "DOS box". In more recent Windows there is no underlying MS-DOS but there's a "fake" MS-DOS box available from a link called "Command prompt" though in later versions (2000/XP) this is being increasingly hidden further down the Start menu!

So to run you Aerofly for MS-DOS you need to start command prompt and then type the command you've been given to start aerofly. Because it is an "MS-DOS" program that almost certainly means that the graphics are going to look very 1980's and won't be anything like the advanced graphics we've come to expect from Windows programs these days.

Have fun (it's a bit of nostalgia if nothing else!)

Cliff