15.2.4.1 1D barcodes (barcode)
In the classic 1D barcodes (barcodes), there are the two-level codes (two-level codes) and the multi-level barcodes (multi-level codes).
Two-level barcodes have two different bar widths (narrow and wide). Two-level barcodes include Interleaved 2 of 5, MSI Code, Codebar, Code 39 and Extended Code 39.
In the case of multilevel barcodes, there are more than two different bar widths (e.g. very narrow, narrow, normal, wide, very wide). Multi-level codes include: Code 11, UPC/EAN, Code 128 and Code 93.
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