GNU/Linux 64-bit Last-Modified: Sun, 20 Nov 2016 17:52:37 GMT GNU/Linux 32-bit Last-Modified: Sun, 13 Sep 2015 20:05:15 GMT MS Windows Last-Modified: Mon, 27 Mar 2017 04:59:05 GMT macOS Last-Modified: Wed, 08 Mar 2017 01:30:56 GMT