Abstract: Method and apparatus for creating, editing, and processing an interactive system made up of event-actuated action items. In one aspect, an event interpreter for selecting action items for execution based on occurrences of events in an interactive system includes an input section by which the event interpreter receives a computer-usable signal indicating that an event has occurred, an event name generator for generating an event name based on the computer-usable signal, and an application selector for comparing the event name to the event identifier for action items stored in a file system and for selecting for execution an action item whose event identifier corresponds to the event name. In another aspect, the action items of the interactive system are displayed hierarchically using the file system editor.