Barcode
concept · 1952 · Digital age
A machine-readable code of bars.
Principles and materials it uses
- Laser diode — uses. Barcode scanners use lasers.
- Binary number system — uses. The bars encode digits.
Where it is used
- Cash register — is used in. Tills read barcodes.
- Supermarket — is used in. Barcodes.
- Self-checkout — is used in. Scanning.
- Warehouse robot — is used in. Navigation by markers.
History: what it evolved from and what it influenced
- QR code — evolved into. A two-dimensional barcode.