Windows Mobile是微软针对移动产品而开发的精简操作系统。2009年2月，微软发布了Windows Mobile 6.5系统。Windows Mobile捆绑了壹系列针对移动设备而开发的应用软件，这些应用软件创建在Microsoft Win32 API的基础上。可以运行Windows Mobile的设备包括Pocket PC、Smartphone和Portable Media Center。该操作系统的设计初衷是尽量接近于桌面版本的Windows。继任者Windows Phone操作系统出现后，Windows Mobile系列正式退出手机系统市场。2010年10月，微软宣布终止对Windows Mobile的所有技术支持。

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 versions (similar to the desktop versions of Windows) and was aimed at business and enterprise consumers. By 2007, it was the most popular smartphone software in the U.S., but this popularity faded in the following years. In February 2010, facing competition from rival OSs including 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.