 Computer Aided Design and Computer Aided Manufacturing are often used to assist in the design and manufacture of artificial limbs.Most modern artificial limbs are attached to the residual limb (stump) of the amputee by belts and cuffs or by suction.The residual limb either directly fits into a socket on the prosthetic, or—more commonly today—a liner is used that then is fixed to the socket either by vacuum (suction sockets) or a pin lock.