A national system of innovation has been defined as follows:

A cultural system may be defined as the interaction of different elements of culture.

Dynamical systems are defined over a single independent variable, usually thought of as time.

A coordinate system co-moving with the particle can be defined.

The neural system is defined by a possibly large number of neurons and their connections.

The coordinate system is defined from the viewpoint of the wave source, before and after scattering.

A closed system is defined to be one which does not communicate with the outside.

The system in question is arbitrary and can be defined as needed according to the application.

A thermodynamic system can be defined in terms of its states.

Thus, the international system is defined in terms of states.