Classes of molecules are disclosed which can, for example, be used in molecular switches. On each of these surfaces are metal layers in a stack adherent to the base metal. The DMA command messages are arranged in a first-in first-out queue, in the order in which they are received. According to an embodiment, a set of resources associated with an execution environment is configured such that the resources are accessible by two or more computers of a group of networked computers, such as a server farm, without requiring configuring duplicate sets of the resources. Lastly, determine if the absolute value of the difference between the first sampling value and the third sampling value is smaller than a second threshold value or not: if not, neglect this contact point; if yes, use the average value of the first and second sampling values to obtain the coordinate value of the contact point.