Human Tech Tree
Researched1974 · Atomic & Space Age (1945 – 1990)

Energy & Industry / Transport & Mobility

Barcode & Scanner

On 26 June 1974 a pack of chewing gum is the first item scanned with a Universal Product Code in a US supermarket.

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Woodland and Silver patented the idea in 1952, and IBM's George Laurer designed the UPC bar pattern that a laser scanner and a small computer can read. The barcode made tracking of goods cheap and underlies modern retail and logistics.

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