Services: Economic activities -- such as transportation, banking, insurance, tourism, telecommunications, advertising, entertainment, data processing, and consulting -- that normally are consumed as they are produced, as contrasted with economic goods, which are more tangible.

Socialism: An economic system in which the basic means of production are primarily owned and controlled collectively, usually by government under some system of central planning.

Social regulation: Government-imposed restrictions designed to discourage or prohibit harmful corporate behavior (such as polluting the environment or putting workers in dangerous work situations) or to encourage behavior deemed socially desirable.

Social Security: A U.S. government pension program that provides benefits to retirees based on their own and their employers' contributions to the program while they were working.