Lesson 18: Does your island need an "Inventory"?

If your island (or game) will have an "inventory" or you need to "Save the
game" or you need to have a score of the players etc. your Cobalt island needs
to access an external Database. 

We will have some lessons about SQL Database access from a Cobalt island but,
to do this access, an "Ordered Collection" is an important intermediary
resource.

This new lesson (18) is about the Class  Ordered Collection.

OK. If you don't know what is an SQL Database and you would like to create
"inteligent" Cobalt islands or games (and to make lots of money)  it's time to
go to an  University and a course of Computer Science or similar