Windows XP Media Center Edition  – Microsoft’s PC-centric Entertainment Center, formerly code-named "Freestyle”. It helps turns your personal computer into a home entertainment center.  It has DVR capacity, an electronic program guide(s), remote control activation of functions and can among other things, connect your PC to your TV.
http://en.wikipedia.org/wiki/Windows_XP_Media_Center_Edition
See Window Media Center

PCTV (PC-TV) Businesses

PCTV, PC-TV Converters, PCTV Converters, PC-to-TV Device)
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Home Theater PC

HP Windows Media Center PC

Media Center

Media Center Extender

Media Center in Windows Vista

Media Center PC

Media-centric Home User

Vista Windows Media Center

Windows XP Media Center Edition

Windows Vista Ultimate

Windows Vista Home Premium

Xbox™ Media Center
See the Interactive Television Institute.