A medical device guide having an inner member having a proximal end, a distal end, and at least one lumen therein. A transactional memory word is provided for each piece of data. Vehicle comprising light assemblies include those where the light assembly is a vehicle tail light assembly. The new XML router selects its adjacency based on a prioritized set of metrics, including TCP hops, IP cost, and fanout, along with specific parameters relating to fanout and IP cost.