Title: The NASA astrophysics data system
Description: The Astrophysics Data System (ADS) is a NASA-funded project whose main resource is an abstract service, which draws abstracts from a variety of national and international scientific sources.  The abstracts are divided into four sets: astronomy and astrophysics, instrumentation, physics and geophysics, and the ArXiv Preprints archive.
Subjects: Astrophysics, Abstracts, Astronomy, Astronomical instruments, Geophysics, Physics