Which retail technology innovation first allowed customers to pump their own gas at service stations without attendant assistance, revolutionizing transportation retail?

The transportation industry has dramatically transformed how it sells fuel and services to consumers over the decades. One innovation fundamentally changed the customer experience at gas stations, shifting from full-service attendants to a self-service model that revolutionized the entire retail approach. This poll tests your knowledge about this pivotal retail technology transition that forever changed how we interact with transportation service providers.

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Pay-at-the-pump card readers (1980s)
Self-service dispensers with remote authorization (1970s)
Automated digital display pumps (1990s)
RFID-enabled customer identification systems (2000s)