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The Online Store of the French organization for standardization. You can find the documentation related to the "Interoperability rules for the codification of computer ticketing data (INTERCODE)". Reference : XP P99-405.
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The website of the Calypso users (Calypso Networks Association), which provides information about the Calypso teleticketing standard.
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The Calypso Licence Policy is managed by Innovatron, the original inventor of the smart card. Innovatron ensures that any interested manufacturer may have access to a Calypso licence on reasonable and non-discriminatory bases.
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The ISO 14443 standard : Identification cards - Contactless integrated circuit(s) cards - Proximity cards.
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Spirtech is an independent engineering and design company, expert in the fields of smart cards, cryptography and contactless technology (ISO 14443). Spirtech provides technical ressources on Calypso technology.
