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51 Abbreviations and Acronyms Abbreviations 2-D two-dimensional API application programming interface BRT bus rapid transit CRM customer relationship management EFPS electronic fare payment system EMV Europay, MasterCard, and Visa ID identification MaaS Mobility as a Service NFC near-field communication NS Nederlandse Spoorwegen (Dutch Railways) PCI payment card industry PII personally identifiable information QR Quick Response (code) RTD Regional Transportation District SaaS Software as a Service SNCB Société national des chemins de fer belges TAP Transit Access Pass
