The American Association for the Advancement of Science (AAAS), founded in 1848, is the world's largest general scientific society.
It serves 262 affiliated societies and academies of science and engineering, representing 10 million individuals worldwide.
It is publisher of the journal Science, which has the largest paid circulation of any peer-reviewed general science journal in the world and an estimated total readership of 1 million.
AAAS presidents serve a one-year term, beginning in mid-February at the close of the AAAS Annual Meeting.
In accordance with the convention used by the AAAS, presidents are referenced based on the year in which they left office.