A class is the formal definition of an object and acts as a TEMPLATE from which an instance of an object is created at runtime.
The class defines the properties of the object and the METHODS used to control the object’s behavior.
PeopleSoft delivers predefined CLASSES (such as Array, File, Field, SQL, and so on).
You can create your own classes USING the APPLICATION class. You can also extend the functionality of the existing classes using the Application class.