you can assign an application to a category and then display either a single category or all your applications.
by default, your handheld includes system-defined categories, such as all and unfiled, and user-defined categories, such as games, main, and system.
you cannot modify the system-defined categories, but you can rename and delete the user-defined categories. in addition, you can create your own user-defined categories. you can have a maximum of 15 user-defined categories.
you cannot categorize applications that reside on an expansion card.

4. tap the pick list next to each application to select a category.

tip to create a new category, tap edit categories from the pick list. tap new, enter the category name, and then tap ok to add the category. tap ok again to close the edit categories dialog box.
5. tap done.