Advanced Card Systems Ltd. (ACS) has recently put up demo.acs.com.hk , which shows some demo applications that use ACS devices. The first application featured on this page is the e-Purse and Loyalty Demo, which shows users how to create cashier and customer cards, shop for products, top up e-Purse cards, and convert loyalty points to e-Purse value. This is for users who want to come up with point of sale–related applications and loyalty programs.