Definition of "Usenet"

And as the Carnegie Mellon study is careful to point out, pornographic image files, despite their evident popularity, represent only about 3% of all the messages on the Usenet newsgroups, while the Usenet itself represents only 11.5% of the traffic on the Internet.

2001 June 24, Philip Elmer-Dewitt, “On a Screen Near You”, in Time‎