Professional Organizations

• AMS  (American Mathematical Society)
• AWM  (Association for Women in Mathematics)
• IMA   (Institute for Mathematics and its Applications)
• NSF   (National Science Foundation)
• MAA   (Mathematical Association of America)
• SIAM  (Society for Industrial and Applied Mathematics)
• INFORMS  (Institute for Operations Research and the Management Sciences)
• The National Academies
• Kappa Mu Epsilon  (National Mathematics Honor Socieity)

Projects and Research

• Project Mathematics!

Software

• GAMS  (Guide to Available Math Software)
• Mathematica
• MATLAB
• Numerical Recipes

Highly Recommended

• Ask Dr. Math  (Drexel University)
• Drexel University Math Forum
• Penn State's Math Guide