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University campus life is made easier with the wide deployment of smart card technology. Radio Frequency Identification (RFID)-enabled smart student cards allow students to borrow books at RFID-enabled self-check machines and access various facilities on campus with a simple swipe at a card reader. The student card also allows for small payments such as laundry and air-conditioning in dormitories as well as at vending machines. Students can move around campus without carrying cash. Running out of credit is not a worry either – students can top up their cards online through a digital certificate embedded in their Hong Kong Smart Identification (ID) Card.