Abstract: A work top is height adjustable and may tilt about a horizontal axis near the front edge. The work top may be mounted on an open office beam system or an office screen or partition in cantilever fashion or it may be a free standing unit. The work top is mounted for horizontal sliding movement and tilting on a horizontally extending undercarriage. The undercarriage includes an inclined strut journalled for sliding movement in a normally fixed inclined strut. A cable reeving system interconnects the work top and fixed inclined strut to maintain the work top in the same horizontal position regardless of its elevation. One or more tension springs, the tension of which may be adjusted, interconnect the under carriage and work top to counterbalance the weight of the work top and what may be positioned thereon such as a computer. A releasable latch locks the work top to the under carriage so that the work top may be locked in its height adjusted position.