Adobe Acrobat Reader is a freeware program that allows you to open files that were saved in a PDF format. PDF is a file format used for making documents available while retaining their formatting. You can download Adobe Acrobat Reader from Adobe's website. Please pay close attention to each page on the Adobe website to be sure you are not downloading optional software that you don't want or need.
The newest version of Adobe Acrobat Professional is also available for purchase from The Computer Store.