21.   Nonetheless, privacy groups and some Internet service providers, or ISPs, say there remains a less intrusive alternative.

22.   Privacy groups are worried that this feature will be used as a tracking technology by law enforcement officials.

23.   Privacy groups had said they feared the ID system would mark a further erosion of anonymity on the Internet and allow marketers to collect detailed profiles of consumers.

24.   Privacy groups have long warned about the dangers of centralized information and the dangers of monitoring electronic behavior.

25.   Privacy groups say they are satisfied that they at least managed to prevent any expansion of surveillance.

26.   Privacy groups argue that the measures the government seeks will give the FBI and other law-enforcement agencies worrisome new powers over citizens.

27.   Privacy groups argue that the merger of computers and the Internet has brought the specter of a new surveillance society.

28.   Privacy groups have raised concerns about its use, but there is debate about whether in practice Echelon is very effective.

29.   President of Junkbusters, an online privacy advocacy group.

30.   Privacy groups said that information would be too personal and detailed, so on-line service providers were exempted from the equipment modifications.