Middleware for Digital TV: It's the intermediate software layer that allows the development of interactive applications for Digital TV, regardless of the hardware platform used by set-top box manufacturers.

Ginga: It’s the specification for the intermediary software layer standard (middleware) developed for the Brazilian Digital TV System by Puc-RJ and UFPB.

Interactivity Component: This is the term created by TQTVD to classify each and every application sent by the open Digital TV signal that allows the user to interact with the application using the receiver’s remote control.