The Public Library Association (PLA) is a division of the American Library Association, is a professional association of public librarians and supporters dedicated to the "development and effectiveness of public library staff and public library services." In keeping with this mission, the PLA provides continuing education to members, hosts a biennial professional conference, publishes a trade journal, and advocates for public libraries and literacy. The PLA was founded in 1944 and currently has over 9,000 members.