The Quick Response - QR code - can be read by mobile devices to connect to resources and is actually a 2-D barcode.
Carson Block, Poudre River PL, Ft Collins, presented this webinar. He talked about first commercial use of barcodes as an auto car id for railroads - which brought me back to my dating years in high school and when I dated a young man who worked weekends and summers for the Milwaukee Railroad in South Dakota and I would follow him around as he compared barcodes on his list with the car barcodes.
Carson's favorite use of the QR code is for his Boarding Pass on his phone when he travels, as it can be updated in real time, such as getting a new seat assignment in seconds.
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