Which retail technology was FIRST widely adopted by major airlines for their in-flight shopping programs?

The transportation industry has been revolutionized by retail technology innovations that enhance passenger experience and streamline operations. From contactless payments on public transit to inventory management systems for airline retail, technology has transformed how transportation services market and sell to customers. Test your knowledge about the intersection of retail technology and the transportation sector with this challenging trivia question!

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

RFID inventory tracking for duty-free items (1990s)
Handheld point-of-sale devices for in-flight purchases (1980s)
Seat-back touchscreen retail catalogs (2000s)
Mobile payment systems integrated with frequent flyer accounts (2010s)