A screen panel includes a rigid glass, a lenticular lens and a Fresnel lens laminated with each other, and the edges of the screen panel are sealed. Selected portions of text or data entered into a document and any associated markup language data are passed to an action dynamically linked library for obtaining actions associated with markup language elements applied to the text or data. A correlated metric is defined based at least in part on the open loop transfer function, wherein the correlated metric is correlated to an expected disturbance in regulated output voltage from the digitally controlled switch mode power supply due to a change in load. A rotatable hub is rotatably mounted on the shaft spaced between the fixed hubs. Both the first mirror and the second mirror have high reflectivity.