With electronic images of documents,such as PDF and XPS,users must have the software that created the original document in order to view the PDF or XPS file.

Electronic Images

Digital representations of photographs, drawings, or artwork, which can be viewed, edited, and shared via electronic devices.

PDF

Portable Document Format, a file format used to present documents in a manner independent of application software, hardware, and operating systems.

XPS

XML Paper Specification (XPS) is a specification for a page description language and a fixed-document format developed by Microsoft, intended to be an alternative to PDF.