Windows Phone

Windows Phone is a mobile operating system developed by Microsoft, initially based on the Windows CE kernel before moving to the NT kernel. This operating system has gone through many different iterations, the first being Pocket PC and Smartphone; the former had two versions and the latter only had one. It would later be rebranded to Windows Mobile; Microsoft later abandoned this OS in favor of Windows Phone, initially released in 2010. Windows Phone 8 shifted the OS to the NT kernel, then Windows 10 Mobile was released, serving as the mobile counterpart of Windows 10.

Timeline
{| class="wikitable" style="width: 100%" ! colspan="3" | Windows Pocket PC ! Name ! OS version ! Notes ! colspan="3" | Windows Mobile ! Name ! OS version ! Notes ! colspan="3" | Windows Phone ! Name ! OS version ! Notes ! colspan="3" | Windows 10 Mobile ! Name ! OS version ! Notes
 * Windows Pocket PC 2000
 * 3.0
 * Released on 2000-04-19
 * Windows Pocket PC 2002
 * 3.0
 * Released in 2001-10
 * 3.0
 * Released in 2001-10
 * Windows Mobile 2003
 * 4.2
 * Released on 2003-06-23
 * Windows Mobile 5.0
 * 5.0
 * Released on 2005-05-09
 * Windows Mobile 6.0
 * 6.0
 * Released on 2007-02-12
 * Windows Mobile 6.1
 * 6.1
 * Released on 2008-04-01
 * Windows Mobile 6.5
 * 6.5
 * Released on 2009-05-11
 * Released on 2008-04-01
 * Windows Mobile 6.5
 * 6.5
 * Released on 2009-05-11
 * Released on 2009-05-11
 * Windows Phone 7
 * 7.0
 * Released worldwide on 2010-10-21. Released in the U.S. on 2010-11-10
 * Windows Phone 8
 * 8.0 (NT 6.2)
 * Released on 2012-10-29
 * Windows Phone 8.1
 * 8.1 (NT 6.3)
 * Released on 2014-07-15
 * Windows Phone 8.1
 * 8.1 (NT 6.3)
 * Released on 2014-07-15
 * Windows 10 Mobile
 * 10.0 (NT 10.0)
 * Released on 2016-03-17
 * Released on 2016-03-17