Patent ID: 7542273

Claim:
A tablet computer comprising: a first display unit comprising: a first front surface; a first display device mounted in the first front surface, the first display device capable of displaying electronic sheet music; and a first back surface; a second display unit comprising: a second front surface; a second display device mounted in the second front surface, the second display device capable of displaying electronic sheet music; and a second back surface; and a hinging assembly coupling the first display unit to the second display unit, the hinging assembly defining an axis of rotation that allows each display unit to rotate about 360 ° around the axis of rotation with respect to the other display unit; and a first setting wherein the first display unit and the second display unit operate in conjunction with one another when attached; and a second setting wherein the first display unit operates completely independent from the second display unit and the second display unit operates completely independent from the first display unit when detached from one another.