An Eclipse runtime consists of groups of features, which are themselves groups of plug-ins. The application that they all live within is referred to as the product. A product has top-level branding, dictates what the name of the application is, and co-ordinates what platforms the code will run on, including ensuring that any necessary operating-system-specific functionality is present. In the previous chapter, a product based on Eclipse 4 was created; but products work in the same way for both Eclipse 3.x and Eclipse 4.x.