A container for storing items and adapted for being stacked upon and nested within like containers. In the initialization phase, lists of all possible interface definitions are established. The compliant pin header assembly has compliant pins for engaging corresponding features on the printed circuit board to connect the compliant pin header assembly electrically to the printed circuit board. A fluid source supplies purge fluid to the manifold and a pump is connected to the manifold to remove fluid from the system. The biofeedback response is converted to an electrical signal and is fed back into the CPU to compare against a predetermined database of similar signals obtained from volunteers with known diseases. The service model can include relationships between workloads and demand traces.