Abstract: A cover for a cabinet of the kind having an exposed portion to which access is to be controlled in which the cover has a panel to be attached to the cabinet; the panel has an opening corresponding to the exposed portion; a movable door is arranged to obstruct access to the exposed portion when the door is in a first location, and to permit access to the portion through the opening when the door is in a second location; and a locking mechanism is provided both for locking the panel to the cabinet and for locking the door in the first location. In another aspect, there are a plurality of doors arranged to obstruct access to the exposed portions; the cover has a first state in which a locking mechanism locks only one door in a first location and another state in which the locking mechanism locks at least another door. In another aspect, the doors, when not obstructing access via openings in the panel, lie in parallel planes adjacent to the panel in an area spaced away from the opening.