LETSI (Learning-Education-Training Systems Interoperability) is an international non-profit federation dedicated to promoting technology-supported learning and to enabling innovation in learning technologies. LETSI's goals include: improving individual and organizational learning and performance; advancing the adoption, use, and evolution of internationally-accepted standards, specifications, and guidelines ("reference models") for learning technology; enabling organizations and individuals that have a significant interest in LET to collaborate globally, using a process that is open, democratic, and sustainable; and providing or sponsoring LET-related services, publications, collaborative forums, professional events, and technology development.