Calypso is the open standard for ticketing deployed all over the world.
Calypso is designed by users for users to ensure multi-sources of compatible products, and make possible the interoperability between several operators.
Calypso offers the most modern ticketing system thanks to its continuous innovation process, including evolutions toward mobile phones, account based ticketing, public key infrastructure and other technologies.

For more information about Calypso and to join the non for profit association managing the Calypso specifications, please contact the Calypso Networks Association (CNA)