when an expansion card is properly seated in the expansion card slot, your handheld responds based on the contents of the card and the application that is active when you insert the card. in some cases, the application on the card opens automatically upon insertion, or if you insert a card containing data from the current application, the application displays the data on the card. in other cases, the home screen switches to the card and displays its contents, and the pick list in the upper-right corner of the screen displays the name of the card.