A system, method, and call processing component for controlling an order of call processing among a plurality of call processing components. The surface acoustic wave element comprises a first filter structure having a first center frequency, a second filter structure having a second center frequency and a shield electrode between the first filter structure and the second filter structure. The probe card assembly can include a plurality of probes disposed to contact an electronic device to be tested. The apparatus includes a container having a contoured end that causes the flexible circuits to stack upon the contoured end. The model can be modified or transmitted for viewing or for fabricating dental appliances. The device and system provide a controller that is capable of communicating with a dispensing device so as to extract, arrange, process, and present a data set from the dispensing device to a user such that the user may selectively monitor statistics related to the administration of contrast media, saline, or other consumables used during one or more dispensing operations.