You need a PDF reader to view PDF files. These programmes enable you to read and print PDF files. Information about PDF Readers which can be downloaded free of charge can be found here.
Viewing and downloading PDF documents
If a PDF Reader is installed, you can view PDF documents directly in your browser by clicking on the file.
If your browser does not support the software or if you want to save the document directly to your hard disk, right-click on the document (for Windows) or hold down the button longer (for Macs) and select "Target/Save Link As..." from the menu. Choose where you wish to store the file on your computer.