The book contains the self-formative units 1 to 11 of the series "Economy" in which basic notions of economy are given, the concepts of economy, goods, economic system are defined, the main characteristics of the capitalist system are explained, operation of the system of prices, operation of a company in the production system, the concept of income, salary, interest and profit is defined, different legal forms of the company, forms of market, functioning of the economy economic cycles, monetary and fiscal policy applicable to Colombia and finally the characteristics of a planned system are described