Biochip

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".

Left Behind: Global Justice
In Left Behind: Global Justice, the biochip technology was implemented as part of the "mark of loyalty" in the year 2037, along with a tattoo mark on the person's right hand or forehead that displayed either the Antichrist's initials or the region code of the person. The system requires a special fingerprint scanner that would authorize online purchases through the Internet.

Real world counterpart
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.