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 coordinates 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 E4 was created; but products work in the same way for both Eclipse 3.x and Eclipse 4.x.