C39zip -

Code 39, also known as "Code 3 of 9" or "Alpha39," was the first 1D barcode symbology to encode both numbers and letters. It is widely used in industrial, military, and healthcare sectors for tracking assets and equipment because it is self-checking and supports variable-length alphanumeric data. Common File Implementations

: Because it is self-checking, a separate check digit is optional, though often recommended for enhanced accuracy. C39zip

: Includes uppercase letters (A–Z), digits (0–9), and a few special characters (-, ., $, /, +, %, and space). Code 39, also known as "Code 3 of

: Many developers provide the Code 39 font as a ZIP archive (often nicknamed c39.zip ) to allow users to print barcodes directly from standard word processing software. Key Technical Attributes a separate check digit is optional