... Cards are more and more widely used in many applications, such as promoting, marketing, loyalty, hospitality, enterprise, etc. With bringing ... ASTC Card Service. ASTC serves over 500 hotels around the world based on two facts, that to makethe best product and ... them into more than 50 countries worldwide. We serve world-class brands such as Hilton, Marriott, and CROWNE PLAZA, INTERCONTINENTAL etc. ...