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- GNU barcode is a tool to convert text strings to printed bars. It supports a variety of standard code to represent the strings and creates postscript output. Features include:
- available as both a library and a command line frontend (so you can include barcode printing in your application)
- supports UPC, EAN, ISBN, CODE39, and other encoding standards
- Postscript and encapsulated postscript output (other backends can be added as needed)
- Accepts sizes and positions as inches, millimeters, and centimeters
- Can create tables of barcodes (to print labels on sticker pages)
- Barcode Writer in Pure Postscript prints various barcode formats entirely within Level 2 PostScript. This means the printer itself converts the input string into the printed output, so you needn't re-implement the barcode generation process whenever your language needs change. It supports all major barcode formats.
- Bookland is a Python program that generates ISBN bar code symbols (Bookland EAN-13 + 5-digit add-on) in EPS format. Includes UPC-A and EAN-13 classes, so it may be useful in a broader context. You can create a bar code even withou the full ISBN number as bookland will calculate the check digit for you. The program also creates the EAN13 number and check digit and determines the parity patterns and bit encodings.