I already have Adobe Acrobat Reader, Do I need any other software to view the PDF files?
No. If you already have Acrobat Reader installed and configured on your system, you can
go ahead and view any PDF file.
However, depending on the version of your browser, you can view the file online or offline.
Some browsers have Acrobat Reader as a plug-in which would start a new viewer page and the PDF
file will be placed directly online in this new window.
If your browser does not support such a plug-in, as you press on the file you wish
to view, a dialog box will come up giving you the option to either view this file online
"Open it now", or "Save it on Disk" for offline viewing.