MathSciNet is composed of the data in Mathematical Reviews and Current Mathematical Publications, leading publications that catalog and review research literature in mathematics. It contains information from 1940 to the present. (Updated daily)
Abstracting and reviewing service in pure and applied mathematics. The MATH Database contains more than 1.8 million entries drawn from more than 2300 serials and journals. The entries are classified according to the Mathematics Subject Classification Scheme (MSC 2000). Covers: pure mathematics (e.g. algebra, logic, topology, geometry, analysis), probability theory, statistics, mathematical physics, classical, solid and fluid mechanics, numerical mathematics, mathematical programming, theoretical computer science and automata theory, systems theory, control, operations research, economics, information and communication, circuits, coding, cryptography, applications in biology, chemistry, sociology, psychology.
ArXiv is an e-print service in the fields of physics, mathematics, non-linear science and computer science. arXiv is owned, operated and funded by Cornell University, a private not-for-profit educational institution. ArXiv is also partially funded by the National Science Foundation.
JSTOR, originally funded by the Mellon Foundation, began as an effort to ease the increasing space problems faced by libraries by converting back issues of paper journals into electronic formats that would allow savings in space, improved access to journal content and offer a possible solution to preservation problems associated with storing paper volumes.