olemus
temaatiliste uudisegruppide pealisvõrk (peamiselt Internetis), mis algselt loodi 1979.a. kahe USA ülikooli vahel ja põhines protokollil UUCP; 1990il oli uudisegruppe kümneid tuhandeid
Wiktionary:
(Internet) a world-wide distributed discussion system consisting of newsgroups classified hierarchically by subject

ülevaateid
https://www.youtube.com/watch?v=wNlsMKUQSo4
https://en.wikipedia.org/wiki/Usenet
https://www.usenet.com/what-is-usenet/
https://www.ou.edu/research/electron/internet/usenet.htm
http://navigators.com/usenet.html
https://www.outlookexpresstips.com/top-list-of-usenet-newsgroups-sorted-by-popularity-r3.htm