Definitions for "PDF Files"
A translation format developed by Adobe used primarily for distributing files across a network, or on a Web site. Files with a .pdf extension have been created in another application and then translated into .pdf files so they can be viewed by anyone, regardless of platform. The Adobe Acrobat Reader can be downloaded as freeware.
Adobe Acrobat native file format making fully formatted documents available seamlessly across all computer platforms with all type and layout intact.
See Adobe Acrobat Reader.