Usenet is a distributed discussion system that allows users to post and read messages in various categories called newsgroups. It was created in 1980 and operates over the Internet, enabling users to share information and engage in conversations on a wide range of topics. Messages on Usenet are organized in a hierarchical structure, making it easy to navigate through different subjects. Users can access Usenet through newsreader software, which allows them to subscribe to specific newsgroups and participate in discussions. Although its popularity has declined with the rise of social media, Usenet remains a valuable resource for niche communities.