A Powerpoint slideshow or PPS document can be converted to a PDF file using OpenOffice application software. With OpenOffice software, the links in the PPS file are preserved. There is no data loss when using OpenOffice to convert a PPS file to PDF. The OpenOffice software must be installed on the system in order to use it. OpenOffice is free and can be downloaded to the computer system from the OpenOffice website. Once it is installed in the system, the PPS file to be converted has to be opened and exported to the PDF format with OpenOffice.