Abstract: An adjustable drawer assembly is disclosed comprising first and second arm members (28,30) having inward ends pivotally journaled to a housing member (4), and a carriage plate (20) for transporting the arms from a storage position within the housing to an operable position in front of the housing. Distal ends of the first and second arms include meshing teeth (44,73) for locking the arms together whereby preventing downward pivotal movement of the arms relative to the housing. A third arm member (78) is provided in support of to a keyboard support surface (104). The third arm is pivotally connected to the second arm member, whereby enabling the keyboard support surface to pivot into alternative angular attitudes. Meshing gear racks (42,90) are provided on the second and third arm members for inhibiting pivotal motion, and actuation means (92) is provided for simultaneously releasing the meshing teeth racks whereby enabling coincidental vertical and angular repositionment of the keyboard support surface.