The product distributed in any country during a single year is variously described by economists as the national product, the national income, the national dividend. It consists not merely of material goods, such as houses, food, clothing, and automobiles, but also of those non-material goods known as services. Such are the tasks performed by the domestic servant, the barber, the chauffeur, the public official, the physician, the teacher; or any other personal service "that is valued, as material commodities are valued, according to their selling prices." Even the services of the clergyman are included in the national income or product, since they are paid for and form a part of the annual supply of good things produced and distributed within the country. In the language of the economist, anything that satisfies a human want is a utility, and forms part of the national wealth; hence there can be no sufficient reason for excluding from the national income goods which minister to spiritual or intellectual wants. The services of the clergyman, the actor, the author, the painter, and the physician are quite as much a part of the utilities of life as the services of the cook, the chambermaid, or the barber; and all are as clearly utilities as bread, hats, houses, or any other material thing. In a general way, therefore, we say that the national product which is available for distribution among the different productive classes comprises all the utilities, material and non-material, that are produced through human agents and satisfy human desires.