BoFs
A birds of a feather (BoF) session is an opportunity for a small group interested in a particular topic to get together for a discussion. In the free software world, that could possibly mean having using a conference as an opportunity to have a BoF session for people interested in Replicant development or users of GNU Emacs. BoF sessions are especially useful for situations where the topic would not attract a large portion of the audience, or where the members of the group would like to go into more technical detail than usual.