I believe the online groups for computer users that we used to be able to access on our WebTVs were called Google Groups or Usenet. See here:

https://www.google.com/search?q=are+google+groups+the+same+as+usenet%3F&rlz=1CAXJLZ_enUS1138&oq=are+google+groups+the+same+as+usenet%3F&gs_lcrp=EgZjaHJvbWUyBggAEEUYOdIBCTkxNThqMGoxNagCBbACAQ&sourceid=chrome&source=chrome.rb&ie=UTF-8

If you go to Google Groups here and click on Recent Groups, you can see a list of old groups you used to go to:

https://groups.google.com/

They are all overrun with spam now, sadly.