Barcode / Binary / Binary Level / BWR

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Barcode

A method of the automatic recognition which enables to input alphabet, numeral, mark, etc. digitally into the computer by replacing them under an algorithm, to the 1-dimentional black/white pattern (actually 2-D for it has several width).

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Binary

In this case, binary digits.

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Binary Level

One of the types of barcode.
bar widths consist of 2 types: narrow bar and wide bar: CODE-39, CODABAR, 2 of 5 barcodes, etc. (See Multi-level)

BWR

Bar Width Reduction.