Forum: A lot like a listserv, but all posts are made through the website instead of by email. Discussion forums are great for organizing discussions into topics and subtopics. Some allow members to have posts, and notices of new posts emailed to them.

Blog: This is like a journal and press-release software all in one. A good blog has a distinctive personality or group of personalities at its core. There is also a social aspect to blogs. Many blogs allow visitors to post comments. Sometimes long discussions can take place on a blog, but each topic is started by the blog owner.

Group: An organized place to discuss a specific topic.