Opus (stylized as OPUS) is a rechargeable, dual interface (contact/contactless) smart card automated fare collection system using the Calypso Standard and is used by major public transit operators in Greater Montreal and Quebec City, Quebec, Canada. It complies with the ISO/IEC 14443 standard for smartcards and can be read by smartphones with an NFC antenna.
Opus (stylized as OPUS) is a rechargeable, dual interface (contact/contactless) smart card automated fare collection system using the Calypso Standard and is used by major public transit operators in Greater Montreal and Quebec City, Quebec, Canada. It complies with the ISO/IEC 14443 standard for smartcards and can be read by smartphones with an NFC antenna.
Source: Wikipedia "Opus card" · CC BY-SA 4.0
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