The adjustable keyboard surfaces in cluster workstations also fix the position of the computer, making the workstation less flexible for other tasks. The optimum positioning of the VDU monitor to minimise screen reflections and background glare is also inhibited. Convenient height adjustment for the whole of the work surface should be aimed for. Cluster workstations have the advantages of dividing up individual workstations, providing supports for shelving and ducting for cables, but in choosing between different products of this type, the ease of height adjustment should be carefully examined. Another problem to consider is the work.