Multipurpose Smartcard System
To carry several cards one card can simultaneously be an ID, a credit card, a stored-value cash card, and a repository of personal information such as telephone numbers or medical history. Currently smart card implementations can be seen around the world but they are not unified i.e. each developer uses different programming standards and data structures, therefore a variety of smart cards exist in users' society today. An example can be seen in Singapore where they have variety of smart card for the same purpose i.e. storing monetary value. One called E2 Link is used for their public transport system and is also usable in some food courts while the other cash cards are used for their toll system ERP, parking and supermarkets.