An interactive voice response (IVR) system comprises many different application objects which combine to deliver a voice application. These objects typically include IVR programs or scripts, prompts or voice segments and server scripts or programs for communicating with external systems or databases. Large voice applications can contain hundreds of application objects and potentially thousands of voice segments. The grouping of the application objects becomes more important in the later stages of the process. There is described a method of grouping data objects having different data categories, such as IVR programs or scripts, prompts or voice segments, in an application processing system. The method comprises associating a collection of such data objects with a group (a group such as the data objects within a voice application) and arranging the data objects into a sub-groups within the group where each sub-group corresponds to category of the data object (scripts, prompts, voice segments etc) and creating a graphical representation of the sub-groups using a graphical user interface.