A positioning system for anatomically accommodating a person during typing on a keyboard or viewing a monitor includes a base member, a computer monitor, a keyboard and an adjustable mount. A modulation is applied to a component of the focus sensor or the scatterometer such that a defocus as measured by the focus sensor varies according to a certain function. The controller may transmit two separate signals to a device, where one signal is sent via radio waves and the other by infrared light. It is also contemplated that the apparatus may be installed on a chair such that the label is oriented on the back side of the chair. Nodes in the graph represent genes, and edges drawn between the nodes represent corresponding image stacks in a commonly ranked list. The method including forming a first metal line and a second metal line in a first interconnect level, wherein the first metal line is electrically insulated form the second metal line, and forming a via in a second interconnect level above the first interconnect level, the via electrically and physically connecting the first metal line with the second metal line.