PDFs are the universal Adobe Portable Document Format files that you can "view" with any PC that can run Adobe Reader. It's available
for free download from Adobe.com
A brief sampler of PC Encyclo Topics: From Audio to Internet to Windows.
These PC Encyclo topic overviews have been developed over the past four years with feedback from my students as well.
Revised Nov 15 2011 : Using the CoffeeCup HTML Editor