That are not numbers in case you do not know anything about bar codes. That are bars without any numeric value to allow the scanner determine the geometric coherence of the bar code. Therefore, the image you post is presenting a wrong interpretation of what that means in a bar code.
http://www.adams1.com/upccode.htmlThe two six-digit patterns are surrounded by left, center and right guard patterns. The left six digits use odd parity encodation while the right six digits use even parity encodation.
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A typical UPC Version A symbol has center guard bars in the center of the symbol which are longer than the other bars. This divides the symbol into a right and left half. This division allows the symbol to scan in any orientation. The moving beam laser bar code reader in grocery stores produces orthogonal scanning beams either in a cross, starburst, or figure-eight. At least one beam will then pass through each half of the symbol, since the symbol's height is at least equal to half of the length of the symbol.
Sure you can say "It is not actually numbers. Those lines don't mean anything" and so on. But I personally think it is pretty crazy that when John wrote the book of Revelation and foretold that there would be a number that needed to be "calculated" that had man's number 666 in it to buy and sell that we actually do use a mark that has a number that could be "calculated" that has what looks like 666 embedded in it. Call it random chance if you want. You have the free will to do that. I think that perhaps it is something that takes Spiritual insight to see anyways. There will even be some people that call themselves "Christians" that will have absolutely no problem taking a bar code on their hand or forehead because it is "just a barcode" and there is no 666 on it they will say, but it is foolish to think that everyone will walk around with an obvious and large 666 on their hands. That makes no sense.
Here is the verse in Revelation 13 for reference:
16 It also forced all people, great and small, rich and poor, free and slave, to receive a mark on their right hands or on their foreheads, 17 so that they could not buy or sell unless they had the mark, which is the name of the beast or the number of its name.
18 This calls for wisdom. Let the person who has insight calculate the number of the beast, for it is the number of a man.[e] That number is 666.
And I am aware that the pattern for the 6 in the first half of the bar-code is different than the 6 in the second half. But there are still three unaccounted lines without numbers on barcodes. You can justify this however you want. I personally think it is pretty cool that the Bible foretells that there will be a number of any kind used to buy and sell. This would have been beyond anyone's understanding back then. Only God could have know this.