 Windows Embedded Handheld retains backward compatibility with legacy Windows Mobile applications.Windows Embedded 8.1 Handheld was released for manufacturing on April 23, 2014.Known simply as Windows Embedded 8 Handheld (WE8H) prior to release, it was designed as the next generation of Windows Embedded Handheld for line-of-business handheld devices and built on Windows Phone 8.1, which it also has compatibility with.