when did they start putting barcodes on products
Barcode In July 1972, RCA began an eighteen-month test in a Kroger store in Cincinnati. Barcodes were printed on small pieces of adhesive paper, and attached by hand by store employees when they were adding price tags. The code proved to have a serious problem; the printers would sometimes smear ink, rendering the code unreadable in most orientations. However, a linear code, like the one being developed by Woodland at IBM, was printed in the direction of the stripes, so extra ink would simply make the code "taller" while remaining readable. So on 3 April 1973, the IBM UPC was selected as the NAFC standard. IBM had designed five versions of UPC symbology for future industry requirements: UPC A, B, C, D, and E.[9]
Mars (chocolate bar) In 1932, Forrest Mars, son of American candy maker Frank C. Mars, rented a factory in Slough and with a staff of twelve people, began manufacturing a chocolate bar consisting of nougat and caramel covered in milk chocolate, modelled after his father's Milky Way bar, which was already popular in the US.[4] The bar and the proportions of the main components have changed over the years. With minor variations, this version is sold worldwide, except for the US, and is packaged in a black wrapper with red gold-edged lettering.