The present invention relates to test systems for testing integrated circuit devices and to calibration associated systems and methods. If a client-entered input data may be resolved without further client input, the server resolves the input data into a recipient entry that has an associated routing address. The varistor part 30 consists of a stack of varistor layers 31, 32 with internal electrodes 31a, 32a, and the varistor layers contain ZnO as a principal component, and contain at least one element selected from the group consisting of Pr and Bi, Co, and Al as additives. The measurement agent may be a system management interrupt transfer monitor that can create virtual machines to execute in SMM, for example.