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.

Probability section of the mathematics e-print arXiv

Buffon's Needle simulation and a surprising demonstration of Barbier's theorem about shapes of constant width

Part of Dave Rusin's excellent Mathematical Atlas

Parrondo Paradox simulation and a demonstration of the ratchet effect.

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

By Richard Jeffrey. HTML.

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

Part of Dave Rusin's excellent Mathematical Atlas.

The Applied Probability Trust is a non-profit foundation for study and research in the mathematical sciences. It publishes research journals, a student magazine and occasional special volumes.

In finding a new solution to a classic probability problem concerning the collection of items in a set, a new and useful recursive function has been found, the 'two-dimensional factorial.'

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

A collection of pages maintained by Bob Dobrow to serve people with interests in probability theory and its applications.

The introduction, formulas, software, algorithms, equations, problems, and calculations.