Which retail technology innovation first allowed passengers to completely bypass ticket counters at airports with self-printed boarding passes?

The transportation industry has been transformed by innovative retail technologies that have changed how customers purchase tickets, book rides, and interact with transportation services. From mobile apps to contactless payments, these advancements have revolutionized the customer experience. Test your knowledge about a pivotal technological shift that changed how we access transportation services!

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Home Printing of E-Tickets (introduced by Alaska Airlines in 1999)
Mobile QR Code Boarding Passes (introduced by Continental Airlines in 2007)
RFID Embedded Tickets (introduced by Lufthansa in 2003)
Biometric Boarding Systems (introduced by British Airways in 2001)