An alphanumeric serial number is a type of industrial identifier. It is a combination of alphabetical and numeric characters used to assign a unique identifier to an object. This type of identifier is wide spread in industry because it is human readable.
Alphanumeric serial numbers are often marked as a redundant identification to keep traceability in the case of an unreadable barcode or 2D code. It is important to understand that the bigger the identifier is, the more time it requires to mark it. For a given identifier type and size, the time necessary to mark it is proportional to the laser power of the marking machine.