Each user interface item, like buttons, colors, or the category tree, is defined in a MIVA Script file and compiled into a type of module called a component.
The user interface items that come ready–to–use with MIVA Merchant are each an individual module. In fact MIVA Merchant itself is made up of a collection of modules that create each of the features and tools you use.
Custom add-on modules including item components are typically created by third-party developers. When a developer creates and offers specialized user interface items you can purchase them and use them in your own store.