The Multimission Archive at STScI, called MAST,
supports a variety of astronomical data archives. The focus of MAST
is on scientifically related data sets in the optical, ultraviolet,
and near-infrared parts of the spectrum. With MAST, scientists can
utilize several online tools to search and retrieve data for their
objects of interest. MAST supports a variety of missions including
HST, FUSE, ROSAT, and GALEX.