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Bar code is the most cost-effective Auto-ID solution. A series of bars and spaces are able to encode your data.
In order to print barcode, people used to buy thermal printer. But with the advance of computer technology, you can do the same job at much lower cost.
Barcode font is one of many solutions of barcode printing.
When you raster an image on computer monitor, the resolution is usually around 75 dpi.
And when you print an image to printer, the usual dpi is at least 300.
Therefore, if you save a screen image, like a bitmap, and output to your printer, it might not be what you want.
That's why people usually use true type font to print barcode, because it's WYSIWYG (What You See Is What You Get).
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