As an example, consider a strictly layered system, where each layer can only use services provided by the layer immediately below it.

Attention turned to the Nike X concept, a layered system with more than one type of missile.

The rules were supposed to produce a "layered" system of defense.

The VPchat server deals with this by using a two layered system.

The differences can be explained by a low level of gene flow carried by women moving one way in a firmly layered system.

In many layered systems, some conflicts when concepts at a high level of abstraction need to be translated into lower, more concrete artifacts.

President Bush has said he wants to build a "layered" system capable of shooting down missiles at varying points in their trajectory.

Some mollusk shells protect themselves from predators by using a two layered system, one of which is nacre.

Instead it was greatly reduced by the layered defensive system which had no Western counterpart.

The idea of using vents in a layered system appears to be new.