
1985 also saw the release of the very first Microsoft operating system, Windows 1.0. Actually, the first number use was 1.01, about 18 months after it was first announced. I'm now a committed Mac user, so do not write about Microsoft with any deep affection, but it's hard not to appreciate the massive impact that Bill Gates and Microsoft have had on the world of computing and indeed many of our lives. It is however only fair to state that Apple had been using a DOS based system for 8 years before Microsoft.
The system requirements for Windows 1.0 constituted CGA/Hercules/EGA (or compatible), MS-DOS 2.0, 256 KB RAM, and 2 double-sided disk drives or a hard drive.
Windows 1.0 runs a program known as MS-DOS Executive. Other supplied programs are Calculator, Calendar, Cardfile, Clipboard viewer, Clock, Control Panel, Notepad, Paint, Reversi, Terminal, and Write.
Windows 1.0 does not allow overlapping windows. Instead all windows are tiled. Only dialog boxes can appear over other windows.

Check this ad from 1985 out featuring Steve Ballmer. Man this guy is committed to the cause, even now!
So there we are, Windows is undoubtedly the most widely sold Operating System in the world and another important thing that happened in the best year ever, 1985. Are you starting to believe me now?!