Which accidental discovery, initially rejected by its inventor's company, revolutionized retail inventory management and is now scanned over 6 billion times daily worldwide?

The retail industry has been transformed by numerous inventions and discoveries throughout history. From the humble barcode to sophisticated AI algorithms, technological innovations have revolutionized how products are sold, tracked, and marketed. Test your knowledge about a groundbreaking invention that fundamentally changed retail operations worldwide and continues to impact our shopping experiences today.

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

The barcode (UPC), accidentally invented when Norman Woodland drew lines in sand and later rejected by IBM before being adopted years later
RFID tags, discovered when a radio engineer noticed interference patterns could identify objects, initially rejected by Motorola as impractical
The electronic cash register, invented when James Ritty noticed ship propeller counters could track transactions, initially rejected by NCR
Contactless payment technology, developed after an engineer's failed MRI project showed cards could transmit data wirelessly, rejected by Visa initially