Remember when they started injecting little ID beepers under the skin of pet dogs and cats? It allowed owners to more quickly recover them when they wandered off. Now, Delta Airlines is using computer bleeps to cut back on lost and misdirected luggage.

No, they’re not injecting passengers with beepers. Just their bags. As each is placed on the conveyor belt, a small computer signal IDs it for that specific flight. If no signal, a red light flashes, and the belt would stop until a Delta baggage handler sends the bag on a correct route.