The first PC i had was an Amstrad PC1640 which came with MS-DOS 3.2. Later i bought a copy of MS-DOS 4.0 (which i thought personally was good though it had many critics at the time) and later PCs came with v5.0. DOS was quite a limited operating system and there was a huge industry of add-ons and enhancements, software like Xtree which was highly popular.
Eventually Windows took over and people stopped caring which DOS they were running, especially after Windows 95 replaced it. I can still remember some of the commands though like dir and type.
These days i run Mac OSX however i have DOSbox installed for running old games (something i seldom do to be honest, no time to play!) I can thus open it and type those commands again. And then return to my GUI.
