An institution created by Congress in 1863 to provide science-based advice to the government. The sister organisations associated with the Academy are the National Academy of Engineers, Institute of Medicine, and the National Research Council. The Academies and the Institute are honorary societies that elect new members to their ranks each year. The bulk of the institutions' science-policy and technical work is conducted by the National Research Council (NRC), created expressly for that purpose. The NRC's Board on Agriculture addresses issues confronting agriculture, food, and related environmental topics.