A subdivision of the Institute for Operations Research and the Management Sciences (INFORMS) concerned with the application of probability theory to systems that involve random phenomena.

A non-profit foundation for study and research. Publications feature research journals, a student magazine and occasional special volumes.

An in-depth but easily readable guide on probability theory, covering various aspects of theory with a bias to gambling games.

Probability activities and simulations in the form of applets and spreadsheets. This site advocates a Question/Hypothesis/Experiment approach to learning probability.

Probability theory basics, applications (including to gambling), interpretations, books, free texts.