In a vacuum type booster device, when the advance of an input member causes an atmosphere valve seat to be separated from an atmosphere valve to advance a power piston, the position of a vacuum valve seat is moved backward relative to the power piston by a distance to which the advance amount of the power piston relative to a housing is decreased at a predetermined ratio. When designated as a custom unit, the memory control unit uses the manufacturer’s ID to protect data in the memory by scrambling the data, or by comparing the manufacturer’s ID with an input ID and disabling access to the memory if the ID’s do not match. The method also includes receiving search input from the user for identifying desired content items and, in response, presenting a subset of content items to the user. The system further comprises a weight sensor configured and disposed with reference to the sizing template to measure the weight value of the carry-on luggage once it is set in the receiving area thereof.