Patent ID: 7705799

Claim:
An electronic device, comprising: a main body including processing circuit that processes data, wherein the main body comprises first and second casings where the first casing comprises a first display device on a surface side and where the second casing comprises a second display device disposed on a surface side wherein the surface sides of said first and second casing correspond to each other; at least one first operation device arranged in the main body on either or both said first and second casings on said surface side of said first or second casing within a movable range of fingers of a hand for holding the main body, wherein the first operation device comprises press-button type operation keys; at least one second operation device arranged in the main body on either or both said first and second casings on an opposite side of said first or second casing relative to said surface side within the movable range of the fingers of the hand for holding the main body, wherein the second operation device comprises a touch pad; and a control circuit that causes, only when one of the first operation device and the second operation device is being operated, the other to function.