Disclosed herein are visual display systems and methods capable of having shifted bit-weights in neutral density filtering applications. A computer system includes power distribution boards arranged to distribute power such that the computer system may continue to operate if there is any single point of power failure. Since the multi-dimensional transform does not depend on using receive or transmit beam lines, a multi-dimensional area can be imaged using a single ultrasound transmission. The cabinet bus includes junction boxes having first and second sets of sensing wires and a side connectors linked to the shelves for providing the shelf identifier signal from the first and second sets of sensing wires. The hook assembly cooperates with the projections to fix the peripheral device.