A coalition of nine of the world’s biggest media companies have signed a pact aiming at cracking down on copyright abuse on the internet. The group, which includes Viacom, Microsoft, Disney and Fox have pledged to use filtering technology to stop the use of copyright materials without permission on file sharing sites. But Google, which owns the biggest file sharing website YouTube, is a notable absentee despite the fact that YouTube publicly launched new copyright filtering technology on the site this month. All nine companies have offered each other an amnesty against legal action for copyright abuse provided the new guidelines are adhered to. The Guardian October 19 2007.