Windows Mobile is a family of mobile operating systems developed by Microsoft for smartphones and Pocket PCs. Its origins 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 editions (similar to its desktop equivalents) and mainly targeted business and enterprise consumers. By 2007 it was the most popular software on smartphones in the U.S., but quickly dipped in the following years. Facing competition from rival OSs including iOS and Android, in February 2010, 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, following which Microsoft ceased development on Windows Mobile in order to concentrate on Windows Phone.