XPS International LLC was founded in June 1994. At this time, XI LLC sells: the DTP-ready "Spectral Data Processor (SDP)" software, the unique, self-consistent "SpecMaster" Digital Spectral Data-Base System, a 5 volume set of handbooks of XPS spectra titled "Handbooks of Monochromatic XPS Spectra", and PDF handbooks of the elements and their native oxides and commercially pure binary metal oxides, complete with peaks fully labeled and identified.