What is "barcode"

Barcode is a graphical representation of numerical or alphanumeric data. The decoding (reading) of the data is performed by a type of scanner - the barcode reader -, which emits a red ray that runs through all the bars. Where the bar is dark, the light is absorbed; where the bar is clear (spaces), the light is reflected back to the reader. The data captured in this optical reading are understood by the computer, which in turn converts them into human-readable letters or numbers. The use is very common in several areas, since the industry and widely used in trade and services.

Bibliographic References:

• THE MATHEMATICS OF BARRASC CODES. POLCINO MILIES.
• Practical Applications of Barcode, Author: Vera Lucia Pinheiro da Silva, Nobel Publisher.