What software is required to view the PDF documents I purchase? Victoria Phucas November 04, 2019 20:40 Updated Follow You will need Adobe Acrobat Reader to view electronic PDF documents purchased from the CLSI store. You can download a free copy of Adobe Acrobat Reader here. Related articles How do I access invoices and purchased PDFs? What are the system requirements for eCLIPSE Ultimate Access? How do I access documents included under my organization’s membership? Can I share documents with other locations within my hospital's network? How do I become a CLSI member?