Every few days, Google continues to change its logo to commemorate significant events in history. Last week, it was Gandhiâ€™s birthday and his photo appeared alongside the login, the week before it was Googleâ€™s 11th birthday.Â The logo today is a barcode because today is the 57th anniversary of the first patent of the barcode. The first patent for the barcode was by inventors Norman Woodland and Bernard Silver. The original patent applied to a system that encodes data in circles and could be scanned from any direction. Over the years, the barcode system evolved into the rectangular barcode with strips of black and white line which is what we see today.
If you click on the barcode on the google page, a variety of articles appear that will give you information about the barcode.