Most, if not all, guest management systems in hotels use hotel key cards. Chances are you’ve probably got a hotel key card more than once in your life to access a room.

Some hotels use access cards with magnetic strips, popularly abbreviated to 'mag stripe cards'. Magnetic stripe cards are also known as 'swipe cards'. But there are other alternatives to hotel access, such as proximity (RFID) cards, access cards with holes, photo ID cards, barcode cards, and smart cards.

All RFID hotel lock card are based on different technologies but provide more or less the same functions for door access control. Smart cards can include plenty of additional information. With a smart card, the holder can not only access his or her room, but can also use other services, such as restaurant, utility or laundry in the hotel to get a joint record of all bills at one place. This helps with the financial management and makes the user feel like a welcome guest.

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