About PDF Files
Adobe® Acrobat® Portable Document Format (PDF) files allow the author/publisher to reproduce a document on the World Wide Web in a very similar manner to its appearance on paper.
This is in contrast to the Web documents - such as this one - formatted using the ubiquitous Hypertext Mark-up Language (HTML). HTML is only capable of very restricted formatting, and also allows different browsers much leeway in the displaying and printing of document contents.
In order to view or print PDF documents, you must install the free Adobe Acrobat Reader.
Download the free Adobe Acrobat Reader.