Redmond surprised developers at Build by launching Linux Bash support, but it's now gone back to its bread and butter with updates to its Universal Windows Platform (UWP) apps. As a reminder, those are designed to work across Windows mobile, Xbox and the desktop. Perhaps the most important among the new crop are from Facebook, which has gone Universal for both its main app and Messenger. Advertisers will also be able to reach nearly three million Facebook Universal app users via the Facebook Audience Network. Other social apps, including, Twitter, Instagram and Vine also received new UWP updates.