A cable management device for managing cables extending between a support rack and an object slideable in and out of the support rack includes a support having a stop member and a mounting surface that is removably fastenable to the support rack. The computing device is augmented with a smartcard reader, and the user obtains a smartcard and connects it to the device. A substantially continuous position error signal is generated based on the combinations of the burst amplitudes, indicating radial position of the read head relative to the target position. When a motorcycle lands on the ground after the motorcycle jumps while running, the fuel-in-jet, that is, the fuel in the needle jet, tends to accelerate downwardly. The controller adjusts the Revolutions Per Minute of the bulb to thereby adjust a color temperature of light emitted from the bulb.