Code39, also known as 3 of 9 code, USD-3 and LOGMARS, is a widely used bar code symbology defined in ISO/IEC 16388:2007 standard.
LOGMARS stands for Logistics Applications of Automated Marking and Reading Symbols. It is a variation of code 39 as defined in Military Standard MIL-STD-1189B.
Code 39 only accepts 43 valid input characters:
26 uppercase alphas (A - Z),
10 digits (0 - 9),
hyphen(-), period(.), space, dollar sign($), slash(/), plus(+) and percent (%).
Other input characters will be omitted by the Code39 system.
Code39 is a self-checking barcode symbology that usually does not require a checksum digit. But in applications that require high accuracy, a modulo 43 checksum character is appended after the data. If you download Barcodesoft code39 demo, you will find source code in VBA and C language of Code39 checksum calculation.
With Barcodesoft Code39 Font, it is quite simple to encode code 39 bar codes. Just put asterisks (*) before and after your data, then apply one of the following code39 fonts. Code39 bar code will appear.
There are fourteen code39 barcode fonts contained in the package as listed below, marked by different trailing indicators. The code39 barcode fonts vary in aspect ratios. Those code39 barcode fonts with "Hr" in their names have human readable text printed underneath code 39 barcode.
Barcodesoft Code39 Demo is fully functional even with the "Demo" watermark.
Barcodesoft Code39 barcode fonts are available in true type, PostScript and PCL formats and can be embedded into Adobe PDF files.
| Aspect Ratio | With Human Readable | Without Human Readable |
| XXS | Code39XXSHr | Code39XXS |
| XS | Code39XSHr | Code39XS |
| S | Code39SHr | Code39S |
| M | Code39MHr | Code39M |
| L | Code39LHr | Code39L |
| XL | Code39XLHr | Code39XL |
| XXL | Code39XXLHr | Code39XXL |