Which technological innovation revolutionized movie theater point-of-sale systems in the early 2000s, allowing for the widespread adoption of advance online ticket purchases?

The movie theater experience has transformed dramatically over the decades - not just on screen, but also in how we purchase tickets and concessions. Point-of-sale systems in cinemas have evolved from simple cash registers to sophisticated platforms that manage everything from reserved seating to loyalty programs. This trivia question explores a pivotal moment in the modernization of the moviegoing experience that changed how theaters operate their customer-facing transactions.

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QR code ticketing integration
Real-time seat selection databases with visual interfaces
RFID-enabled loyalty card systems
Blockchain-based ticket verification