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]
History of warning labels in the US In 1966 the Federal government mandated that cigarette packs have a warning on them from the surgeon general. See Tobacco packaging warning messages. Congress voted in 1973 that products containing “toxic substances” must have labels. In 1985 there was a testimony that wanted record companies to put labels on music that contained sexual or violent lyrics. On March 29, 1990 warning labels were put on music products that contained potentially offensive lyrics; this was done with the agreement of the recording companies. In 1989, alcohol was required to have their surgeon general’s warning.