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The best corporate April Fools' Day pranks of 2015

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Microsoft MS-DOS mobile app

Feeling nostalgic? Then download Microsoft's MS-DOS mobile app. Marketed as the simplest OS yet, the MS-DOS is all about getting back to BASICs.

"Turning our back on graphics was hugely liberating," says Daniel Glass, the lead designer on the project, "We've dropped the resolution, and in doing so re-discovered our roots."

Source: Microsoft Lumina