11.   Computer networks are hardly the first high-tech headache for copyright holders.

12.   Computer networks are hardly the first technological challenge to copyright holders.

13.   Courts have already settled the conflict between copyright holders and pirates like the song-swapping service Napster.

14.   Copyright holders say they are willing to share the burden of halting cyber-theft.

15.   Courts have more or less settled the conflict between copyright holders and file-sharing services like Napster.

16.   Digital watermarks can identify the copyright holder of an image or an audio file and show whether something is a legitimate or pirate version.

17.   Earlier this month, a court injunction ordered Napster to ban the transfer of specified songs within three days of notification by the copyright holders.

18.   Hope the ambiguity of current digital copyright law swings in favor of the copyright holder - So far, it has.

19.   If copyright holders do complain, Scour will remove links to the materials in question, the notice says.

20.   It is hard to gauge the economic impact that overturning the law would have on copyright holders.