A handheld computer includes a processor; a memory in communication with the processor; and at least one light-emitting device that emits visible light as a visual indicator of an occurrence of a designated event. The processor is programmed to selectively activate the visual indicator in response to an occurrence of a designated event to provide the visual indicator to a user of the handheld computer. The processor is programmed to monitor for occurrence of two or more different types of designated events. The processor varies the visual indicator based on the type of the event for which occurrence is being signaled by that visual indicator, such that a different visual indicator is associated with each type of event for which the processor is programmed to monitor.