Google doodle: 57th anniversary of invention of the bar code

Alastair Jamieson
Telegraph
October 7, 2009

[efoods]Users of the internet search engine are being greeted with a bar code in place of the usual Google logo, exactly 57 years after United States inventors Norman Woodland and Bernard Silver were granted a patent.

It follows recent Google doodles in honour of the ancient Chinese philosopher Confucius and Mahatma Gandhi, the father of modern India.

Woodland and Silver, who met while students at the Drexel Institute of Technology in Philadelphia, originally devised a system that would encode data in concentric circles.

The lines of varying width were developed later, partly inspired by Morse code.

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