About File Formats
Acrobat Documents -- PDF
Many documents are released and posted to the website in PDF (Portable Document Format). Acrobat format, also called Portable Document Format (PDF), preserves the original appearance of a document without requiring you to possess the software that created that document. With the proper software, you can view and print PDF files even if you don't have the word processor that was used to create them, and you can do it right from your Web browser.
You may need to shut-down and reboot your computer after installation.
For information about, and software for, making Acrobat documents accessible to the visually impaired or disabled, go to access.adobe.com.