Not so long ago, creating a PDF document used to require expensive commercial software. Even though there were freeware apps available the final product never really matched that of more professional solutions and was not of a high enough quality for commercial printing. PDFs are a universal file format that can be used for displaying all manner of information including images and text and are an easy and effective way of sharing information, so it's useful to be able to download and read the literature within these documents. 04 Mar 2009