Microsoft's Windows Mobile 6, internally code-named "Crossbow'". It was officially released by Microsoft on February 12, 2007. Windows Mobile 6 was still based on Windows CE 5 and was effectively just a face lift of Windows Mobile 5.
With Windows Mobile 6 also came Microsoft's new naming conventions and devices were no longer called Pocket PCs. Windows Mobile Classic would become the name for Pocket PC type devices without phone capabilities and Windows Mobile Professional would be used for devices with phone capabilities.