A method for providing a mobile network code associated with a network operations center to a mobile terminal. A fixed bed of adsorbent is saturated with pX and EB, which are preferentially adsorbed, the feed is stopped, and lowering the partial pressure desorbs the pX and EB. The method and induction coil are particularly adapted to provide an induction hardening heat treatment for trunnion surfaces of trunnions used in steel spiders of spider or tripod-type constant velocity joints. The computer input device has a low overall profile with a low center of gravity and a relatively small footprint and is preferably used in conjunction either with another computer input device of a similar configuration or a computer mouse-style input device.