AMS Digital Mathematics Registry providea centralized access to collections of digitized publications in the mathematical sciences, and related areas like computer science.
MathML is a low-level specification for describing mathematics as a basis for machine to machine communication which provides a much needed foundation for the inclusion of mathematical expressions in Web pages.
OpenMath is an emerging standard for representing mathematical objects with their semantics, allowing them to be exchanged between computer programs, stored in databases, or published on the worldwide web.