In which decade was the first electronic point-of-sale terminal (EPOS) with real-time inventory tracking widely adopted by major retailers?

Test your knowledge about the fascinating evolution of retail technology! Point of sale (POS) systems revolutionized how merchants conducted business throughout history, transforming from simple cash registers to sophisticated data hubs. This question explores a pivotal moment in retail history that changed how transactions were processed forever. Consider how technological innovations of the past shaped today's retail landscape.

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1950s - During post-war economic boom
1970s - When IBM introduced the 3660 supermarket system and NCR released the 255
1980s - With the rise of personal computers in business
1990s - When barcode scanning became standardized globally