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 Where should I ask technical questions about the content of standards and guidelines? What are the system requirements for Infobase? What are the terms and conditions of use for Eclipse Ultimate Access? How do I access invoices and purchased PDFs? I have a bulk print order request. How do I place my order?