In a DVD recordingplayback system, a set top box STB receives an MPEG transport stream constituted by a plurality of transport packets, and a formatter extracts support information indicating if management information included in the transport packets includes predetermined items. The power management signal lines are coupled to general purpose inputs in the south bridge or super IO. The invention also provides a liquid crystal display device having a short response time, a small power consumption, a low driving voltage, and a large contrast, and containing the composition described above which can be used in a large temperature range. To provide a compact arrangement in which the first and second pumping chambers are reliably sealed from each other, the second pumping means is driven by the drive shaft via a magnetic coupling. The computer is subscribed to listen for a message with topic an identifier of the retail space.