April 1, 2015 11:40 AM EDT

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.

Fans of the monochromatic interface that put Microsoft on the map 34 years ago can download MS-DOS as a free app from the Windows Phone store, then struggle to execute jargon-laden commands to access files and launch primitive apps.

The app launched with a slickly produced promotional video on YouTube, in which executives offer deadpan praise for a “beautifully simple OS,” that, perhaps thankfully, is a thing of the past.

 

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