Code39 TrueType Barcode Font - Version 3.1 Code39 TrueType Barcode Font for use by windows applications and other systems that allow use of TrueType or Type 1 fonts. Barcode can encode Numbers 0 to 9, Characters A to Z, and several special characters. This barcode is stackable and provided with no human readable characters. Five font styles are provided these being Standard, Wide, Narrow, Short and Tall.