@pickover : In 2015, Windows XP was Number 2 for operating systems used. Source: https://t.co/powmYPBDwx https://t.co/6aVNzgqAVU

@pickover : In 2015, Windows XP was Number 2 for operating systems used. Source: https://t.co/powmYPBDwx https://t.co/6aVNzgqAVU (via Twitter http://twitter.com/pickover/status/985849146287579136)