Abstract: The loss prevention system is a system to prevent articles from becoming lost, misplaced, or stolen. The articles are tagged with, or contain, an identifying device such as an RFID tag or a wireless network interface. The identifying device allows the articles to be monitored by a monitor. The monitor periodically interrogates each identifying device with a transmitted RF signal, and generates an alarm signal if an interrogated identifying device does not reply or is out of range. The identifying devices can be acquired by the monitor and associated with an alias that can be used to associate the identifying device with its associated article.