Nothing matters in a commercial product as much as the design of the interface. Macintosh users are quick to judge anything on their computer by that critical first impression.
Using HyperCard opens the door to anyone with a creative idea to earn good money from developing a commercial stack.
Good, effective, seamless, and impressive human interface is no accident. It requires understanding some basic rules and this tutorial explains them all. It provides good and bad examples for each element of excellent design technique.
