Windows Mobile is a discontinued family of mobile operating systems developed by Microsoft for smartphones and Pocket PCs.Its origin dated back to Windows CE in 1996, though Windows Mobile itself first appeared in 2000 as PocketPC 2000. It was renamed "Windows Mobile" in 2003, at which point it came in several versions (similar to the desktop versions of Windows) and was aimed at business and enterprise consumers. It became one of the most popular mobile operating systems as of the mid-2000s, but its popularity faded rapidly in the following years, and by February 2010, facing competition from rival mobile OSs, including Apple's iOS and Android, Microsoft announced Windows Phone to supersede Windows Mobile. As a result, Windows Mobile has been deprecated. Windows Phone is incompatible with Windows Mobile devices and software. The last version of Windows Mobile, released after the announcement of Windows Phone, was 6.5.5. After this, Microsoft ceased development on Windows Mobile, in order to concentrate on Windows Phone.