federalism
Unitary
A unitary government is one in which all powers are held by a central government. A totalitarian government is also one that is highly centralized, hence the origin of the name total-itarian, from total and authoritarian.
Centralized government involves a relatively large region being governed from one location.
unitary
In the definition, few things. Despotism is a form of government in which the powers is centralized in the hand of one man. Despotism is different from dictature in the sense that, in a dictature, an individual is entrusted all political powers. Theocracy is a form of government in which the religious power controls the civil life. You can say some theocracies are a form of "religious despotism".
A country that is large is most likely to have a Federal System of Government.Any country can have a federal system if the population and/or groups representing the population agree to waive certain rights of a local government to a centralized form of government. The powers of the "federal" government can be weak or strong depending on powers granted to it or not granted to it.
Federalism is a form of government where some powers are divided and other powers are shared. A constitutional monarchy is an example of another form of government.
Child Support Agency, was setup by American Government in April, 1993.
A centralized government is the form of government in which power is concentrated in a central authority to which local governments are subject. Centralization occurs both geographically and politically. A centralized government is characterized in which the local governments are designated by the central Government of the country, like the local administrative authorities. In this type of republic unlike a federal republic, local legislative assemblies do not exist. Nearly any government can be said to centralize their power to a degree. The term is applied to governments that vest limited authority to its subjects and often used in comparative terms, such as "highly centralized government" or "weakly centralized government". From: http://en.wikipedia.org/wiki/Centralized_government
the answer is collecting taxes
NASA
YES , division of powers and independent judiciary the two important features of federal form of government