In addition, the UPC has three pairs of double bars which extend down a bit further than the rest. The three pairs appear at the beginning, middle, and end of the bar code. These are not labeled. They are two thin lines -- exactly the same as the pair of bars representing the digit six.
Please don't label me a tin foiler on this -- I haven't bought that this has anything to do with anything, and I'm not saying there is a conspiracy or plan behind it. However, as I said before, I do believe that what the Bible says is true. It does talk about a mark (666) without which people will not be able to buy or sell.