Sound, Radio & InformationData Encoding
Barcodes
Black and white stripes are just numbers in disguise
A cashier slides your cereal past a red light, upside down. How did a row of stripes just say exactly what it is?
You'll find out
- How stripes spell out a number
- What a smudged bar does to a scan
- Why the code reads upside down too
Why it matters
Every product you buy, every package you track and every boarding pass you scan speaks a version of this code.
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