The Files On This Web Site Are Created In Adobe Acrobat, To View These Files You Will Need Adobe Acrobat Reader.
It's available at the following link, just select the Language, Platform (Mac or PC), and Location.
They will request your Name, Email Address and Country. If you DON'T WANT to be spammed by Adobe or their partner companies, I wouldn't put your real Email Address in there.
Adobe Acrobat Reader Download Page
If you use AOL as your primary way to connect to the Internet on your Macintosh, you will need to install the PDF Viewer into your Plug-Ins Directory. This little program will help you do that.
How The Macintosh Handles PDF Files
This Macintosh applet lets you easily change a file's Type to "PDF" so that Acrobat Exchange and Reader can recognize the file. This utility is handy for CD-ROM publishers staging PDF files produced or edited by Acrobat for Windows or UNIX.
Installation Instructions
After downloading a ".sit.hqx" or ".sit" file on a Macintosh, use StuffIt Deluxe or StuffIt Expander by Aladdin Systems, Inc. to access the file's contents. StuffIt Expander is available as a freeware product here.
http://www.stuffit.com/expander/