A computer keyboard incorporates a base member, a keying module and a spacing member coupled therebetween. A palette in the user interface can, in this embodiment, have three states: the palette is open within a window panel; the palette is docked as a tab; and the palette is open in a area connected to the tab. The system is also comprised of a control module configured to calculate a temperature of the plurality of transmitting devices based at least in part upon a shifting status of the plurality of transmitting devices. A powered component voltage regulator is coupled to the powered component and operable to convert a first voltage received from the power system to a second voltage that is supplied to the powered component. The graded thickness profile may be advantageously used to form a lateral diffusion metal oxide semiconductor field effect transistor providing an enhanced performance. The pressure determining unit changes the reference value to a negative pressure side.