This article has a real world counterpart outside of Left Behind.

This subject has a counterpart in the real world. However, information in this article comes from the fictional universe of the Left Behind franchise.

The biochip was a small microchip that could be inserted into a person's body through a syringe-like injector, either in his right hand or in his forehead. The biochip contains all relevant information about the person, including his occupation. It allowed for cashless purchases of all items through the use of eye-level scanners. The biochip was part of the "mark of loyalty" system that the Global Community had enforced on the populace following Nicolae Carpathia's resurrection in The Mark.

In the The Remnant: an Experience in Sound and Drama, Suhail Akbar mentions that the chip allows satellites to track each individual. Even after an individual dies, the chip reports data, but it takes 24 hours after nerve activity ceases that the chip reports host termination. This level of tracking seems to be impossible since it requires a powerful signal to be emitted from the chip that can be received from a receiver at a considerable distance.

Real world

The system now has a real-world counterpart in a system developed by Kevin Warwick. In addition to offering a way to quickly retrieve medical information in an emergency, it also allows for controlling prostheses and robotic elements within the immediate environment. An implantable NFC tag system was released to the public in 2013. The technology is now available for corporate and individual use from a number of vendors, and for hobbyist use here.