I typically avoid the Internet like the plague on April fools day, but this morning I peaked and came across MS-DOS Mobile and just couldn't help but share. This April fools day app brings DOS directly to your Windows phone!
From this app we can dive into files like config.sys.
Launch Windows 3.1
Take ASCII and low res photos
And even play a very retro Rock Paper Scissors game. Cortana helps with the prerequisites required to get the game running.
If you have a Windows phone you can play with MS-DOS Mobile yourself by grabbing it from here. I would also recommend checking out the promotion video below.
Additional Microsoft April Fools Day Links