MS-DOS was the backbone of early PC computing—launched in 1981 and ran the show all the way through the early ‘90s. It was text-only, no mouse, no graphics—just a blinking cursor waiting for commands. If you wanted to run a program, you typed it in. If you wanted to play a game, you better know how to tweak autoexec.bat and config.sys to free up memory. Microsoft kept cranking out versions, with MS-DOS 5.0 in ‘91 adding a full-screen editor, and 6.22 in ‘94 being the last standalone release before Windows 95 came in and started hiding DOS under the hood. It wasn’t user-friendly, but for the people who learned it, it felt like having superpowers. It was raw, fast, and if you messed up, you’d learn real quick.