Open access to 788,666 e-prints in Physics, Mathematics, Computer Science, Quantitative Biology, Quantitative Finance and Statistics.
• Computer Index of Neutron Data (CINDA)
CINDA contains bibliographic references to measurements, calculations, reviews, and evaluations of neutron cross-sections and other microscopic neutron data; it also includes index references to computer libraries of numerical neutron data available from four regional neutron data centers.
Resource for information about particle physics, including press releases, articles, news, event listings and images.
Laws, rules, principles, effects, paradoxes, limits, constants, experiments, & thought-experiments in physics.
• The Nist Reference on Constants, Units, and Uncertainty
This site addresses three topics: fundamental physical constants, the International System of Units (SI), which is the modern metric system, and expressing the uncertainty of measurement results.