To read mail messages, you need a mail client, such as Microsoft outlook Express or Netscape Communicator. Newsgroups resemble the old bulletin-board services of the early PC days. Most newsgroups use the threaded discussion model. When someone posts a message, everyone on the internet can see it by entering that newsgroup. Other users can then add their messages in response to the original, thereby creating a thread of discussion.
People also create new message threads.
To view and respond o newsgroups, you need a news reader. E.g. Ms Outlook Express or Netscape Communicator. From the very beginning, the Internet provided a means for logging into a remote computer and running programs. Telnet services provided this capability. Although telnet is much less frequently used today, it can still connect with remote computers.