Our first computer had MS-DOS, I don't even remember what brand the computer was, I'd have to ask my mom, that was when I was about 4 years old. I'd sit there and watch her do things, between that and her teaching me I learned how to do command line myself not too long after. I'd pop in my floppy disk games and play until I was blue in the face.
Now here we are almost 20 years later, my how things have changed, as shown in this thread.