To view documents, setup Acrobat as a "helper" application in your web browser preferences. Instructions are included with the Acrobat Reader from Adobe. When installed, files with the Acrobat ".pdf" extension automatically launch Acrobat and display the document. If your "helper " application is not set up, you must select the web browser's "Load to Disk" option to download the file to your PC.
Optionally, if you have installed the PDFViewer plug in in your web browser "Plug-ins" folder, when you click on the download link it will automatically display the document in your web browser window. Can't find the PDFViewer plug-in? You will be able to get a copy from the web site for the browser you are running (I.E. www.netscape.com for Netscape) Easiest way is to search for PDFViewer after logging into the browser vendor home page.