title: Explain the difference between a data *structure* and a data *type*
body: <p>While trying to answer <a href="https://stackoverflow.com/questions/4630219/what-is-the-difference-between-a-composite-data-type-and-a-data-structure">What is the difference between a composite data type and a data structure?</a> I realized that while I have a clear idea of what a data type <em>is</em>, and how it is not the same thing as a data <em>structure</em>, I cannot put the difference into words.  If you were teaching an intro CS course, how would you explain the difference?</p>