Once upon a time, there was no Linux. No, really! It did not exist. It was not like today, with Linux everywhere. There were multiple flavors of Unix, there was Apple, and there was Microsoft Windows.
When it comes to Windows, the more things change, the more they stay the same. Despite adding 20+ gigabytes of gosh-knows-what, Windows is mostly the same. (Except you can't drop to a DOS prompt to get actual work done.) Hey, who remembers Gorilla.bas, the exploding banana game that came in DOS? Fun times!