Solve this multiple-choice question and choose the correct option.

Retail technology: In which decade were bar code scanners first introduced into commercial use at checkout counters? Context: UPC adoption in U.S. supermarkets culminated with the first live scan of a Wrigley’s gum pack. Choose the correct decade.

Difficulty: Easy

1950s
1960s
1970s
1980s

Correct Answer: 1970s

Explanation:

ReasoningAlthough bar code concepts date to the 1940s–50s, commercial scanners at checkouts took off in the 1970s. The first retail UPC scan occurred in 1974 on a pack of Wrigley’s Juicy Fruit gum in Ohio.

Final Answer1970s.

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