Economy

As proposed in the related sections, a true, because useful, definition of economy is: science of survival.
Since per such a definition everything is economy, this is the category of those who deal with economy in a broad sense: the orientation, the organisation, the management of the economy.
The orientation is the ethics: motives and aims.
The organisation is the technique: srtuctures and means.
The management is the administration: supervision and action.
Orientation, organisation and management are in fact a speciality of its own, distinct from what is oriented, organised and managed.