Links for PDF (Portable Document Format)

• File Extension PDF from FILExt - The File Extension Source.
• Adobe PDF, from the company that created the pdf format.
• Portable Document Formant , entry in Wikipedia.

Sources of PDF Viewers (not needed with Mac OS)

• Adobe Acrobat Reader.
• FoxIT.

Sources of PDF Generators (not needed with Mac OS)

• Easy PDF, free and trial versions available.