Dialogue groups, also known as message boards or forums, allow internet users to discuss various topics. Some forums require posts to be approved by moderators before being published, while others are open for anyone to freely post. Forums have their own terminology, for example a post is called a "thread" and related threads follow particular topics or themes. People use forums to read and contribute to discussions on subjects they are interested in, such as computers, dog training, relationships, or hobbies like flower arranging. There are many online forums on various topics that can be found through search engines.