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? I have a bulk print order request. How do I place my order? How do I cite a CLSI document? How do I access documents included under my organization’s membership?