A "swipe stripe" is useful for identity, security, purchases, loyalty programs and numerous other functions.
SMART/PROXIMITY CARDS Plastic cards with proximity detectors that activate only when near a lock can be used for simple and safe access control. Plastic Card Embossers
Embossers can be used to make however many (or few) Plastic Gift Card Printing you might need at any given time.
Plastic card embossers are capable of creating thousands of cards if you need that many, but they can also economically produce just a few at a time.