PDFs/Acrobat files can also be downloaded or read within the browser (depending on your system settings). However, this file type requires that you have Adobe Acrobat Reader installed on your system. Acrobat Reader is a free application which may already be present on your computer system. If it is not present on your system, it may be downloaded from Adobe's web site. PDF documents are larger which may cause you to experience a slower download time. However, this file type is better for print and offline reading.