Wikipedia:Today's featured article/March 13, 2005

The Octopus card is a rechargeable contactless smart card used in an electronic payment system in Hong Kong. Originally launched in September 1997 as a fare collection system for the city's mass transit systems, it has grown into a widely used electronic cash system for convenience stores, supermarkets, fast food restaurants, parking garages and other point-of-sale applications, as well as to control access in offices, schools and apartments. Using a card simply involves tapping it against an Octopus reader, and recharging can be done with cash at add-value machines, or via directly debiting credit cards and bank accounts. Octopus has become one of the world's most successful electronic cash systems, with over 12 million Octopus cards in circulation (nearly twice that of Hong Kong's population) and over eight million transactions per day, with nearly 300 service vendors. The operator of the Octopus system, Octopus Cards Limited, a joint venture between MTR Corporation and other transport companies in Hong Kong, has won a number of contracts to extend Octopus-style systems to the Netherlands and Changsha. (more...)

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