[1.49] What do Sensormatic and Checkpoint mean?

Sensormatic and Checkpoint are two point-of-sale security systems. The names refer to the little metal tags that are inserted into DVD packaging to set off an alarm if you go through the sensors at the store entrance without having the tags deactivated during checkout. The tags are placed in the packages at the replication plant so that it doesn't have to be done at the store. This is called source tagging.