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Play To, new in Windows 7, makes it easy to play music and video on other networked PCs, TVs, or stereos around the house. Just right-click the tracks you want to enjoy, or add them to your Windows Media Player 12 playlist, and select Play To—now you're a DJ.
Play To works with other PCs running Windows 7 and devices that carry the "Compatible with Windows 7" logo. To find one, visit the Windows 7 Compatibility Center.