EPUB format is an electronic book format that can be opened in most e-readers, tablets and mobile devices (except for the Kindle, which uses a different file format).

EPUB files can also be read on computers, although you may have to install a software program or Web browser plug-in first.

To access the Portable Document Format (PDF) version you must have a PDF reader installed. If you do not already have such a reader, there are numerous PDF readers available for free download or for purchase on the Internet:

• Adobe Reader (www)
• Foxit Reader (www)
• Xpdf (www)
• Expert PDF Reader (www)

If you choose not to use Acrobat Reader you can have the PDF file converted to HTML or ASCII text by using one of the conversion services offered by Adobe (www).