Exactly What Is The Distinction Between A Digital Piano And A Ke

<img src="http://www.digitalpianoreviews.co/wp-content/uploads/2013/05/Digital-Piano-Reviews-Casio-Privia-Pro-PX-5S-Digital-Stage-Piano2-200x200.jpg" /> What is the difference between a digital piano and a synthesizer or keyboard? Given that the terms digital piano as well as keyboard are