To read PDF files, you will need to install the free Adobe Reader which can be downloaded from Adobe. It is available for a variety of platforms, including:
If you wish to create PDF files, you will need to buy the full version of Acrobat. Universities can usually obtain it at a preferential rate: contact your own purchasing department.
It is also possible to create PDF files using a PostScript printer driver and GSview, a free PostScript viewer.
See also: