A very safe and reliable turbo-molecular pump has been developed so that if an abnormal condition should develop on the rotor structure, it will not lead to damage to the stator or pump casing to cause a loss of vacuum in a vacuum processing system. An output device is arranged externally at the body. Sublimation dye-based UV ink printing onto polyester is preferred. The device is preferably comprised of a passive transponder and the system preferably uses a handheld transceiver to locate the transponder attached to the target animal. The algorithm operates in a stealing mode where threads can steal resources from other threads if none of the threads is starving, and operates in a first-in first-out mode if one or more of the threads becomes starving.