And in current research on P2P technology, file-sharing system is no doubt the most important application.

而使用点对点技术的文件共享系统无疑是其中的最重要的研究领域。

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One purpose of the Digital Millennium Copyright Act (DMCA) is to protect the technology of file sharing, and companies that use it, by inventing a theoretical "safe harbor" that shelters all sorts of user-powered platforms from the consequences of illegal actions by the users.

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Allegedly, from September 2009 until September 2011, the defendants obtained separate audio and video for motion pictures showing in theaters, and then edited and combined those components into one infringing movie file, which was shared among thousands of IMAGiNE Group members through the BitTorrent file sharing technology.

FORBES: More iMagine Group Movie Pirates Walk The Plank In Federal Case

The deal shows how far Skype has come since it was launched in 2003 by Niklas Zennstrom and Janus Friis, two men who had created a file-sharing technology called Kazaa that became widely associated with music piracy.

WSJ: Microsoft Near Deal to Buy Skype for Nearly $8 Billion