Code39, also known as 3 of 9 code, USD-3 or LOGMARS, is one of the most widely used bar code symbologies.

Code 39 accepts only 43 valid input characters: 26 uppercase alphas, 10 digits and hyphen(-), period(.), space, dollar sign($), slash(/), plus(+) and percent (%). Other input will be omitted by code39.

However, it is possible to encode a full ASCII table by combining 2 characters together to represent the third character. This is how Code 39 Extended barcode font is created.

Code39 is a self-checking barcode symbology that usually does not require a checksum digit.

With Barcodesoft Code 39 Extended Font, it is quite simple to encode full ASCII code 39 bar codes. Just type in asterisks(*) before and after your data, then apply one of the following Code39 fonts, code39 bar code will appear.

When you scan Code39 Extended bar code, you need to set up your scanner to utilize full ASCII feature.