Square pianoThe square piano is a piano that has a horizontal, rectangular or polygonal, case with the keyboard set in the long side.
HybridHybrid pianos blend characteristics of string instruments and attributes of the pump organ or the self-playing pianola.
Vertical pianoThe vertical piano is a piano that has a vertical frame whose greater part is located above the keyboard. Depending on the shape of the frame, different names are used, including: giraffe piano, pyramid piano, lyre piano, bookcase piano, etc.