Verse 16 - 18
"...causeth all... to receive a mark..."
In the Universal Products Code (UPC) each pair of lines represents a number, with the exception of the pair of lines on the left; the two in the center and the two on the right side. These are referred to as "guide bars" which help the scanner read the product info when scanned from a variety of positions. The width and spacing of the lines representing the numbers determine which numbers are recognized by the scanner.
In the first example of the UPC (Universal Products Code) shown above, it can be seen clearly that the lines representing the three 6's on the right half of the bar-code are the same width as the three guide bar line sets (left, middle and right). While there was probably no sinister intentions considered in the developement of the UPC; it is evident that if such a system were to fall into the hands of the right person, it could easily be employed or understood to be a 666 based system. Perhaps if solid guide bar lines had been used, which could not be interpreted as having numerical value, the possibility of it use in such a way would be negated: but the fact is, that the current guide bar lines are identical to those used for the number "6" on the right side of all UPC bar-codes, despite the developers insistence that this cannot be construed to represent any connection to the Biblical 6-6-6.
In the instance of the second bar-code example, you will see the number 6 on the extreme right side, and two others between the left and center guide bars. The latter two are comprised of a thin and a thick line, which may help to distinguish which half of the UPC code the three different 6's are in when read by the scanner at different angles. Currently, within the guide bars of a standard UPC, there are enough digits, to include a persons Social Security Number or possibly a bank account number. A very secure system could be realized, since the only one who would have access to an account would be the person to whom the code for that account have been applied to their body (hand or forehead).
In connection with the possible use of bar-codes as a means of identification, the United States Patent Office has issued a patent (# 5,878,155 - Dated 2 Mar, 1999) to a man in Texas, for using bar-codes in this manner. In citing a precedent for such a thing, he used the example of the Nazis tatoo-ing the Jews during World War II. Full details, including drawings and schematics for this can be view by going online to the U.S. Copyright & Patent Office, and entering the patent number in the search box for that purpose.