"Master/slave is a model of communication where one device or process has unidirectional control over one or more other devices. In some systems a master is ele

"Master/slave is a model of communication where one device or process has unidirectional control over one or more other devices. In some systems a master is elected from a group of eligible devices, with the other devices acting in the role of slaves."[0] I'd say that master/slave describes perfectly well the relationship between the parts. [0] http://en.wikipedia.org/wiki/Master/slave_(technology) http://en.wikipedia.org/wiki/Master/slave_(technology)