The table interface called the Reactable and the iPhone app RjDj both embed Pd as a sound engine - prototyping audio for video games by a number of audio designers. (For example, EAPd is the internal version of Pd that is used at Electronic Arts (EA). It has also been embedded into EA Spore)
by objects, placed on a screen called canvas. - Objects are connected together with cords, and data flows from one object to another through this cords. - Each object performs a specific task, from very low level mathematic operations to complex audio or video functions.
Help Browser..., click on the first item in the list, Manuals, then click on + Start Here. Open the first example patch, +start-here.pd, and follow the three steps listed there.....