A method of managing systems in a managed network can include storing configuration information corresponding to at least one managed system and automatically generating a grammar and a speech dialog for each managed system using the configuration information. The shape, location and material of the inflatable balloon are selected such that when inflated, the balloon conforms to the shape of the complex vasculature, or at least a portion thereof, without appreciably deforming the vessel walls. After the HDCMPU judges that a drop is occurring, the HDCMPU detects whether the drop judgment is incorrect according to whether a shock sensor detects a shock occurrence and changes the drop judgment condition based on a detection history of detected incorrect judgments. At least one engaging member is mounted in the casing and biased to selectively engage with one of plural retaining sections of the retainer, thereby exerting an engaging force between the engaging member and an associated retaining section of the retainer. Finally, the change records are applied to the complete copy of the data object, thereby bringing the complete copy of the target data object to a state as it existed before the change described by the initial change record was made to the target data object. In various embodiments, the first storage unit may be bound to a third storage unit prior to the upgrade process.