Abstract: A stand for supporting and securing an item such as a portable computer comprises a hinged leaf assembly with adjustably positionable clamping members. The clamping members are slidingly secured along outer edges of hingedly connected leaves of the leaf assembly to permit sliding advancement of the clamping members relative to and along the edges of the leaves to which they are attached. An articulated arm is secured at an upper end to the underside of the leaf assembly and at a lower end to the surface relative to which the item is to be supported such as the floor of a vehicle.