NLS-Glossary

In optics, a doublet is a type of lens made up of two simple lenses paired together. Such an arrangement allows more optical surfaces, thicknesses, and formulations, especially as the space between lenses may be considered an "element". With additional degrees of freedom, optical designers have more latitude to correct more optical aberrations more thoroughly.

Dots Per Inch. Used in comparing relative printing resolution of thermal printheads and laser print engines.                                                                                                               

is an association which manages a world-wide system that allows the identification and communication of products, services, utilities, transport units and locations. It develops and maintains coding standards for all users, and has the aim of developing a global standard with the objective of providing a common language for international trade.

The international standard or system for applying unique article numbers and bar codes to products. The EAN bar code is a numeric only code, generally encoding 13 digits (known as EAN-13), though in specific circumstances shorter codes (EAN-8) and supplementary codes are used. The North American equivalent (now technically a subset of the EAN system) is the Universal Product Code (UPC).

is a voluntary, not for profit International standards association, established to meet the communication needs of its users. EAN International was founded in 1977, as a result of the initiative of European manufacturers and distributors and has expanded to cover the world. The organization has a membership of 79 Numbering Organizations covering 86 countries. The EAN/UCC system is used by more than 600, 000 companies world-wide. 

Extended Binary Coded Decimal Interchange Code. Developed by IBM, it is the character set used by the IBM AS/400.