A DBMS can be used to build many different types of databases. Each database stores a particular collection of data
and is used for a specific purpose. Over the years, as technology and innovative uses of databases have evolved, different
methods have been used to classify databases. For example, databases can be classified by the number of users
supported, where the data are located, the type of data stored, the intended data usage, and the degree to which the
data are structured.