🛠️ Invention or technique

Barcode and Universal Product Code

Código de barras y UPC

Date
1952-1974 · confidence high
Place
Drexel Institute, Philadelphia (patent); first scan in Troy, Ohio, United States (1974)
Credited to
Norman Woodland and Bernard Silver (patent, 1952); George Laurer (IBM, UPC, 1973)
People
👤 Bernard Silver1924–1963👤 George Laurer1925–2019👤 Norman Joseph Woodland1921–2012
Field
Knowledge & symbols

What it is

A laser-readable bar symbol that identifies each product with a unique number. The first item scanned was a pack of chewing gum in an Ohio supermarket.

What it led to

  • Automated inventory management and global supply chains
  • Large retailers (Walmart) and just-in-time logistics
  • The QR code and the tracking of every object
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