Holograms with numbers are also known as continuous laser numbering holograms. They consist of serial numbers or any other kind of information or data like batch no., serial number, etc. This can be easily used to track and trace inventory of the product. Holograms can also be engraved with alpha numeric digits, which adds additional security. Holograms are extensively used in the field of advertising, decoration, security purposes and, protection. They include a lot of technical and artistic effects thereby making duplication of holograms highly impossible.