Irish Star on MSN7mon
Walmart's emergency codes explained: From 'Code red' to 'Code brown', know what they signify
Understanding these colour codes could be exceedingly useful and potentially life-saving. But why does Walmart favour colours ...
Hackaday1y
Color Can Triple QR Code Capacity
Recently [mit41301] wondered about increasing the data capacity of QR codes, and was able to successfully triple the number of bits using color. He chose the new rectangular micro QR code (rMQR ...