My favorite example is Usenet News, a part of the internet older and less well known than the web. To the user, it looks like a collection of online bulletin boards, each on a different topic–anarchy, short-wave radios, architecture, cooking history. When I post a message to a newsgroup, the message goes to a computer–a news server–provided by my ISP. The next time that news server talks to another, they exchange messages–and mine spreads gradually across the world. In an hour, it may be answered by someone in Finland or Japan. The server I use hosts nearly thirty thousand groups. Each is a collection of conversations spread around the world–a tiny non-geographical community united, and often divided, by common interests.[10]