Barcodes

A barcode is an optical machine-readable representation of data relating to the object to which it is attached. Originally barcodes systematically represented data by varying the widths and spacings of parallel lines, and may be referred to as linear or one-dimensional (1D). Later they evolved into rectangles, dots, hexagons and other geometric patterns in two dimensions (2D). Although 2D systems use a variety of symbols, they are generally referred to as barcodes as well. Barcodes originally were scanned by special optical scanners called barcode readers. Later, scanners and interpretive software became available on devices including desktop printers and smartphones.
Posts about Barcodes
  • Don’t take pictures of your tickets

    … barcodes on them and if your picture of them is clear enough, scammers can print out realistic looking tickets with your barcode on them. Then, if they, or the people the scammers have sold the tickets to, enter the venue before you, your tickets will be rendered null and void. You wouldn’t post a picture of your credit card online, this is very much along those lines. …

    Greg's Corner- 12 readers -