The invention relates to an office device having multiple spatial configurations, including a first work surface and a second work surface, each of the two surfaces having a longitudinal axis and a transverse axis. The first work surface is connected, near a first end thereof, to the second work surface by assembly means enabling rotation of the first surface between a stowed position, in which the longitudinal axes of the work surfaces are aligned, and deployed positions, in which the longitudinal axes of the work surfaces are not aligned. The device is characterized in that the assembly means enable the sliding of the first surface along the longitudinal axis of the second work surface, as well as a rotation by an angle of no less than 90° at any point in the sliding path.