What is a PDF file?
Portable/Public Document Format (*.PDF)
About Adobe Acrobat Reader
documents throughout this Web site are available in Portable Document
Format, called PDF. These files contain complex documents with
graphs, images, and special text that cannot be presented easily
through the typical Web browser. The creator of this file format,
Adobe Systems, offers a free viewer so that you can view any PDF
file. It is called Adobe Acrobat Reader. There are versions for
a wide variety of computers, operating systems, and languages.