February 19, 2021
Code39 (also known as Alpha39, Code 9 of 3, Code3/9, Type 39, USS Code39 or USD-3) is a barcode with variable length. It can represent 43 characters, including uppercase Latin letters (A to Z), numbers (0 to 9) and several special characters (-, ., $, /, +,% and spaces). There is also an additional symbol as the termination symbol (marked as “*”). Each character consists of nine parts: five lines and four spaces, three of which are wider (binary 1) and six are narrower. The ratio between narrow and wide is not important, it can be between 1:2 and 1:3. […]