SpringCard's Calypso Explorer is a free software utility that can be used to read and interpret the content of Calypso cards, which are widely used by major transport operators. The utility includes two programs: Calypso XML Dump, a command line interface written in C that reads the files of a Calypso card and exports the decoded records as XML files, and Calypso Explorer, a graphical user interface that allows users to explore the contents of their Calypso card.
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