Some of our resources are available in two formats:

HTML (HyperText Markup Language).
You can see these documents directly in your Web browser. (They are "plain" Web documents.)

PDF (Portable Document Format).
To see these documents, you must have Adobe Acrobat Reader installed on your computer. PDF documents display and print mathematics more crisply than HTML documents, and they include pagination. If you want to create handouts, use the PDF version of our documents.

Installing and using Adobe Acrobat Reader is relatively easy. Adobe Acrobat Reader is free. In fact, many new computers come with Adobe Acrobat Reader already installed. You can read more about Adobe Acrobat Reader and download it if necessary at the following Adobe web sites.

Macintosh users: http://www.adobe.com/support/downloads/acrmac.htm
Windows users: http://www.adobe.com/support/downloads/acrwin.htm