You must have Adobe® Acrobat® Reader® to view PDF files. To obtain a free copy go to http://www.adobe.com/products/acrobat/readstep.html.
A viewer for Microsoft Word 2000 is also available, free from Microsoft at http://office.microsoft.com/officeupdate/category.aspx?CategoryID=CD010225841033&CTT=4&Origin=CD010225191033