Using HyperCard stacks is as easy as double-clicking . If you receive an error message similar to the following:
 
You do not have HyperCard or the HyperCard Player installed on your system. Most new computers come with the HyperCard Player pre-installed. You can also find it on most system software CD-ROMs.
HyperCard and the HyperCard Player are available through your local software reseller or for a reseller near you call Apple directly at
(800) 293-6617. You can also download the Hypercard Player directly from Apple's Software Library at http://swupdates.info.apple.com/