PDF (Portable Document Format) is a popular format for distributing documents on the Internet. To view and print PDF, you need the Acrobat Reader available free from Adobe for most major platforms. It can operate as a free-standing application, or as a browser plug-in that lets you work with documents without leaving your browser.

If you're not sure whether you need this software, try opening this sample PDF document. In most cases, if the reader is installed, the document will display in your browser window, though some machines are configured to display PDF in a separate Acrobat window.

If you need to install Acrobat Reader, the button below opens a new browser window and takes you to Adobe's site. Be sure to close all browser windows before you run the installer.