Abstract: A shelf configured for fitting snugly over the top end of a tower PC. The shelf is a frame formed by a top wall and two side walls, each attached at opposing ends of the top wall. Each side wall is perpendicular to the top wall to form a rectangular-shape open space between the two side walls for receiving the top end of a tower PC to fit flush between the side walls. A section of foam is attached to an inner surface of each side wall for pressing against the outer wall of a tower PC when the tower PC is placed in the open space between the side walls.