This invention relates to the storage under pressure in a container and subsequent transport of the filled pressurized container of particular natural gas or natural gas-like mixtures that contain methane or natural gas plus an additive, and which mixtures have been refrigerated to less than ambient temperature. A set of computer groupings containing the set of computers is identified. A head traction applicator applies a traction force to a patient’s head, and preferably a cushion is provided under the patient’s head. Otherwise, a clock source in which the frequency is controlled by a control signal is used. Since the display medium layer is immediately disposed on the color filter film, the accuracy of aligning the display medium layer and the color filter film may be improved and the parallax resulted from the light passed through the display medium layer and the color filter film may be reduced. The master controller is configured to receive input from the mirror assembly and head position sensor, and adjust the mirror assembly based on the input from the mirror assembly and the input from the head position sensor to maintain a line of sight for the driver.