Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. Before Windows, there was MS-DOS—that’s the Microsoft Disk ...

Microsoft rebooted its old and unimproved MS-DOS interface for mobile phones on Wednesday, touting it as the “simplest OS yet” in what may be the company’s most elaborate April Fool’s Day prank ever.

July 20, 1978: Apple DOS makes its debut on the Apple II, giving Apple its first official operating system. A command line interface with green text prompts on a black background, Apple DOS looks ...