Versions of the Microsoft Windows operating system from Windows XP SP2 support MTP. Media Transfer Protocol (commonly referred to as MTP) is part of the 'Windows Media' framework and thus closely related to Windows Media Player. MTP is a key part of WMDRM10-PD, a digital rights management (DRM) service for the Windows Media platform. Whereas PTP was designed for downloading photographs from digital cameras, Media Transfer Protocol controls the transfer of music files on digital audio players and media files on portable media players, as well as personal information on personal digital assistants. The Media Transfer Protocol is described by Microsoft, who introduced it, as a protocol for intelligent storage devices based on and compatible with Picture Transfer Protocol (PTP). The Acer MTP USB driver allow the transfer of media including music and video to and from an Acer phone or tablet device running Android or another MTP compatible device.