Windows Mobile is a mobile operating system developed by Microsoft that was used in smartphones and mobile devices, but is being currently phased out to specialized markets. It is superseded by Windows Phone 7.
The current and last version is "Windows Mobile 6.5". It is based on the Windows CE 5.2 kernel, and features a suite of basic applications developed with the Microsoft Windows API. It is designed to be somewhat similar to desktop versions of Windows, feature-wise and aesthetically. Additionally, third-party software development is available for Windows Mobile, and software applications can be purchased via the Windows Marketplace for Mobile.
Originally appearing as the Pocket PC 2000 operating system, most Windows Mobile devices come with a stylus pen, which is used to enter commands by tapping it on the screen. Microsoft announced a completely new phone platform, Windows Phone 7, at the Mobile World Congress in Barcelona on February 15, 2010. Phones running Windows Mobile 6.x will not be upgradeable to version 7.
Windows Mobile's share of the smartphone market has fallen year-on-year, decreasing 20% in Q3 2009. It is the 5th most popular smartphone operating system, with a 5% share of the worldwide smartphone market (after Symbian, BlackBerry OS, Android and iPhone). In the United States, it is the 3rd most popular smartphone operating system for business use (after BlackBerry OS and iPhone), with a 24% share among enterprise users. Microsoft is phasing out Windows Mobile to specialized markets, such as rugged devices, and focusing on its new mobile platform, Windows Phone 7
Windows Mobile for Pocket PC carries these standard features in most of its versions:
Today Screen shows the current date, owner information, upcoming appointments, e-mail messages, and tasks. (Is now Home screen in later WM6.5 builds)
The taskbar shows the current time and the volume.
Office Mobile a suite of Mobile versions of Microsoft Office applications
Outlook Mobile comes with Windows Mobile.
Internet Explorer Mobile is an Internet browser developed by Microsoft for Pocket PC and Handheld PC that comes loaded by default with Windows Mobile and Windows CE for Handheld PC.
Windows Media Player for Windows Mobile.
Client for PPTP VPNs.
Internet Connection Sharing (ICS) which in mobile phones allows attached computers to share internet connections via USB and Bluetooth.
Coherent file system similar to that of Windows 9x/Windows NT and support for many of the same file types.
Ability to multitask.
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