A graphical mark-up language authoring system using drag and drop placement of symbols representing mark-up language elements on a computer screen drawing and connecting the blocks by lines representing data and control flow to create a mark-up language sequence design. The sample mount assembly has a pivot arm having a first edge and a flexing section. A first communication transceiver is connected to the first coupler for transferring data signals to and from the first coupler. The brightness of pixels with higher gray levels can be increased while the brightness of pixels with lower gray levels can be decreased, thereby improving the contrast of image and saving power consumption. The SAN access layer may provide SAN information gathered from the SAN to the client application through the SAN access layer API.