PDF is short for Portable Document Format, developed by Adobe Systems. This makes it possible to print formatted documents such as those above. To view a file in PDF format, you need Adobe Acrobat Reader, a free application distributed by Adobe Systems.

If you have questions about PDF and how to print these documents, please visit Adobe's customer support page.

To make a document accessible, please go to the Adobe web page, type the URL of the PDF document, and select the "Get This Adobe PDF Document as HTML" button. The Adobe PDF document will be converted instantly to a format that your screen reader can read, and will be returned to you immediately in your browser application.
http://www.adobe.com/products/acrobat/access_onlinetools.html