From Factory Parts to Restaurant Tables
In 1994, Denso Wave, a Japanese automotive supplier, developed the Quick Response code to help track parts moving through manufacturing. Ordinary barcodes store information in a single line, so they can be slow to scan and hold relatively little data. A QR code stores information across a square grid, letting a scanner read more at once. Its distinctive corner patterns help a camera locate and orient the code, even when it is turned or viewed at an angle.
That design suited a busy factory: workers could scan a part quickly and connect it to information in a tracking system. The code itself does not need to contain a full record; it can instead hold an identifier that points to one. Denso Wave made the format available for broad use, which helped it spread well beyond the production line.
Why a Printed Square Became a Menu
A restaurant could encode a web address in a QR code and print the code on a table card. A customer’s phone camera reads it and opens a digital menu, which the restaurant can update without reprinting every copy. The code is a doorway, not the menu itself: the content lives online.
During the COVID-19 pandemic, many restaurants adopted this setup to reduce the need for customers and staff to handle the same physical menus. The shift also made an existing technology newly familiar to people who had not used it before. The QR code’s lasting advantage was not just that it could be scanned quickly, but that it connected a simple printed mark to changing digital information. A manufacturing tool for identifying parts could therefore serve as a low-cost bridge from a restaurant table to a menu on a phone.
