A microchip implanted into ones hand can be used in Sweden to replace one or more cards.

SWEDEN (NBC) — Thousands of people in Sweden have opted to trade in their ID and credit cards for tiny microchips implanted underneath their skin.

The chips, which use near-field communication technology, take the place of key cards, rail cards and credit cards.

The chips are typically the size of a grain of rice and are implanted just under the skin between the thumb and forefinger.