The AMS, founded in 1888 to further the interests of mathematical research and scholarship, serves the national and international community through its publications, meetings, advocacy and other programs
The Association for Symbolic Logic is an international organization supporting research and critical studies in logic. Its primary function is to provide an effective forum for the presentation, publication, and critical discussion of scholarly work in this area of inquiry.
The National Association of Mathematicians (NAM) is a non-profit professional organization in the mathematical sciences with membership open to all persons interested in the mission and purpose of NAM which are promoting excellence in the mathematical sciences and promoting the mathematical development of all underrepresented minorities.
The Wolfram Functions Site was created as a resource for the educational, mathematical, and scientific communities. It contains the world's most encyclopedic collection of information about mathematical functions.