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Unlocking the Barcode Legacy: Past, Present, and Future

Learn about the history, creation, and evolution of barcodes from their inception to future technologies like 2D codes and RFID. Discover the intricacies of the Universal Product Code (U.P.C) system and the significance of built-in checks, alongside various types of barcodes and their applications. Explore the potential of Radio Frequency Identification (RFID) technology and its implications for the future. Delve into the world of numeric systems and the ingenuity behind these little symbols that have revolutionized modern retail and data tracking.

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Unlocking the Barcode Legacy: Past, Present, and Future

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  1. Bar codes: The little symbol that could Nikki Candelore Discrete Math: Summer ’08 Professor Langston

  2. What is a bar code?

  3. What we take for granted Electronic Cash Register and Scanner Manufacturer Centralized Computer EID Store’s Centralized Computer

  4. U.P.C: Younger than you’d think • 1930s – Harvard punch cards • 1950s – Drexel blanks and bars • 1970s catalysts • 1974, Wrigley’s gum in Troy Ohio • Rising inflation and impact of labor grocery profitability • Deux ex machina – 1973 FDA regulation change on labeling provides real impetus for change • Consumer outrage at prices being removed • 1990s – take off

  5. U.P.C: Younger than you’d think Source: (Brown 4)

  6. Universal Product Code: Main Features Source: (http://www.barcodeart.com/science/science.html)

  7. Universal Product Code: Main Features Module Interpretation Number Systems Chars U.P.C. Digits Source: (Brown 282, 287) and (http://electronics.howstuffworks.com/upc1.htm)

  8. Universal Product Code: Built in Checks • Inverted bars after middle guard bar • Splotches • Check Digit Calculation • Sum odd digits (1, 3, 5..) • Multiply this by 3 • Sum even digits (2, 4, 6..) • Add this to value in Step 2 • Determine then number that added to the above value would generate a multiple of 10

  9. Universal Product Code: Built in Checks • Check Digit Calculation: Example • Sum odd digits (1, 3, 5..) • 6+9+8+0+0+9 = 32 • Multiply this by 3 • 32*3 = 96 • Sum even digits (2, 4, 6..) • 3+3+2+0+3 = 11 • Add this to value in Step 2 • 96+11 = 107 • Determine then number that added to the above value would generate a multiple of 10 • 107 + 3 = 110 • Therefore 3 is our Check Digit

  10. Other types of Bar Codes • U.P.C. symbol • Code 39 • Interleaved Two of Five Source: (Gieco 30)

  11. Code 2 of 5 and Interleaved 2 of 5 Source: (Baker 21)

  12. Code 39 Source: (Baker 21)

  13. The Future: 2D bar codes PDF417 • 2D bar codes build on existing technology • Stacks • Matrices • Check words • Fun applications • p8t.ch website – 2D patches that when scanned links to URL Stacked Matrix Source: (http://www.barcodeman.com/faq/2d.php)

  14. The Future: Radio Frequency Identification • Electronic device uses radio frequencies to communicate • No need for line of sight • Holds more information than a bar code • Can be read from or written to • Security issues remain a concern, particularly for consumers Source: (http://www.howstuffworks.com/rfid.htm)

  15. The Future?

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