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In the recent years, the functions of smart phones become more and more powerful, and the listing of iPhone & iPad results a great boom. Besides, the development of iPhone / iPad Applications (App) becomes more and more popular, which includes games, calendar, translation programs, graph library, dictionary and other useful software. At present, the major method of exchanging business card is still face to face. Since the smartphones become more and more popular, we can regard the phone contacts as the digital business cards. Now, the popular ways to exchange the business card are Bluetooth, Wi-Fi, or e-mail. However, there are some restrictions for the above methods. In this paper, we propose a mechanism to allow users to exchange or share their business card through using QR Code and vCard format. The information in the QR Code is obtained from user’s phone contacts. Users can not only exchange their own business card but also share other’s business cards. This system allows the users to generate and scan QR Code, send e-mail with QR Code, and provide Facebook and Dropbox API to share or back up. We also provide two languages for users to choose.
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