Anatomy of a QR code While it is easy for people to read Arabic numerals, it is hard for a computer. Bar codes encode alphanumeric data as a series of black and white lines of various widths. At the ...
Somewhere in India right now, a transaction is happening. At a sweet shop in Chandni Chowk. At a medicine counter in Imphal. At a roadside stall where a vendor has never owned a cheque book in his ...
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