Mark of the 666 is a barcode. In the coming end of the world the new "world" leader(yes I said world leader when all nations will come under one guy) is going to enforce this barcode on everyone. The barcode has all your info. Social security, driver's license, credit card, everything. This is how he's going to start weeding out the Christians and persecuting them. You basically cant buy or do anything. Already this is happening these past couple of year and people are getting them on their hands or forehead. some christians think this is a blessing by god... UH NO!!!!