But the black matrix bar code symbols have become a harbor for malicious code writers who devise ways to steal personal data.

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Kimberly Bryant is the founder of Black Girls Code , an organization created to empower women of color between the ages of 7-14 by encouraging them to learn code.

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In fact, I found the black and white dress code rather suspect.

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Guests who book a minimum three-night stay for getaways between November 23 and December 30 will receive 50% off during the sale running from Black Friday to Cyber Monday using the promotion code 2U850P (blackout dates December 5-7, 15).

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The basic retail code is nothing more than a transcription, using thick and thin black bars, of the number that appears on the bottom of the code: the first six numbers for the manufacturer, the next six for the product.

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Many business owners blame the complex tax code, which doesn't offer black-and-white standards for telling the difference.

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Using an instrument similar to the scanning bar-code guns at supermarket checkouts, this machine analyses black plastics with a laser.

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He said the attraction was also "dressing up", with a strict black tie dress code.

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