Hi Jef , thank you for your question! With your Forumbee account you have one community. Within that community you can have multiple categories, and within a category you can have multiple topics. Topics are discussion threads. Optionally, you can create private categories for sub-groups. You can grant access to a private category to specific members. See this article for more info on the different types of categories you can add. Let me know if I can clarify anything. Thank you!