The American Library Association's (ALA's) Office for Intellectual Freedom (OIF) strives to educate librarians and the public about the nature and importance of intellectual freedom in libraries, and it will celebrate its fiftieth anniversary in 2017. Libraries are a forum for information and ideas (under the First Amendment), and librarians are responsible for making sure that every person has equitable and unrestricted access. At OIF, the first priority is to make sure that all librarians, educators, and users know this. The second priority is to fight any attempts to limit or remove access. This article briefly describes the roles and responsibilities of OIF and OIF staff.