18.03.2016 IT'S MOBILE "DOS" TIME. 640KB of memory "ought to be enough for anybody."
 

18.03.2016 IT'S MOBILE "DOS" TIME. 640KB of memory "ought to be enough for anybody." Bill Gates,1981

"As an April Fools joke in 2015, Microsoft Mobile launched a Windows Phone application called MS-DOS Mobile which was presented as a new mobile operating system and worked similar to MS-DOS.[20]" (https://en.wikipedia.org/wiki/MS-DOS)