Which calculator innovation first allowed retail businesses to implement digital price scanning and integrated inventory management in the 1970s?

In the history of retail operations, certain technological innovations have dramatically transformed how businesses handle transactions and inventory management. Mathematical tools have been particularly influential in the retail sector, revolutionizing everything from pricing strategies to inventory forecasting. This poll tests your knowledge about a pivotal mathematical device that forever changed retail operations worldwide.

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Texas Instruments' TI-30, which introduced affordable scientific calculations to retail environments
HP-65, the first programmable pocket calculator that retailers used for custom pricing algorithms
Intel 4004-based retail calculators with barcode processing capabilities, enabling the modern POS system
Casio's AL-1000, the first calculator with memory functions that enabled automated inventory tracking