The Society for Social Studies of Science (4S) invites submissions for its 2015 conference in Denver, Colorado, November 11-14. There is no predetermined theme for the 4S conference. Individual abstracts and proposals for sessions should emphasize how they will make original and timely contributions to any theme relevant to science and technology studies (STS). We welcome papers, session proposals, events, and video or film presentations that are innovative in their delivery, organization, range of topics, and type of public.