Funded by NASA, ADS maintains 3 bibliographic databases - Astronomy and Astrophysics, Physics and Geophysics, and ArXiv Preprints - containing more than 8.5 million records, and digital scans of archival materials.
Offers access to the KnowItAll U reference collection of over 1.3 million spectra including structures and chemical property information; includes IR, UV/Vis, NMR, Raman and mass spectra.
Comprehensive coverage of all aspects of chemistry. Combines several Chemical Abstracts Service (CAS) databases.
Collection of technical literature related to the oil and gas exploration and production industry. Access requires authentication (restricted to Princeton University users).