This document provides an overview of smart cards, including their history and uses. It discusses how smart cards ease logistical issues for wireless carriers by storing subscription information externally on the card rather than internally on the device. This allows users to easily personalize and depersonalize devices and supports a global distribution network. Smart cards also provide opportunities for value-added services, enhancing security and creating switching costs for users. Various industries and applications are exploring uses of smart cards, with financial services being an early adopter. Overall smart cards provide secure authentication and a platform for new services in wireless and other industries.