To get the most from your membership you'll need two free tools...1. Adobe Reader: http://www.adobe.com/products/acrobat/readstep2.htmlMany of the downloads are formatted as a PDF (portable document format). This allows information to cross platforms such as PC or MAC. Adobe Reader allows you to "read" the formatting. If you try to open a PDF in a program such as Word, it will look like gibberish.If you have been watching the videos on the site then you already have flash.