Abstract: A casing for computer equipment, the casing comprising first and second leaves for mounting the computer equipment, the leaves being hinged together so as to be movable between a folded position in which the first leaf overlies the second, and an open position; and a base to which the leaves are movably secured so as to allow the second leaf to slide relative to the base. In the open position of the leaves part of the base extends under the first leaf so as to provide a support to resist tipping movement when pressure is applied to the first leaf.