NLS-Glossary

An application using bar code employee badges and bar code slot reading terminals to enter employee start/stop data.                                                                                          

An optional feature of the 2D-Pharmacode symbol; consists of a combination of bars and spaces that enables scanning to be synchronized automatically on fast-moving items (for example, items on a conveyor belt).

An executable program which is loaded into computer memory, is initialized and remains in memory awaiting a specific instruction in order to accomplish its execution. TSR stands for “Terminate and Stay Resident”. The TSR is normally a device driver intended to perform specialized functions such as driving a serial port or directing data from the serial port to the keyboard buffer.

Laser can be divided into four types according to working substance:

1. Solid state laser

Its working substance is solid. Ruby laser, neodymium doped yttrium aluminum garnet laser (i.e. YAG laser) and neodymium glass laser are commonly used. Their structures are basically the same, characterized by small and solid, high power. At present, neodymium glass laser is the device with the highest pulse output power, which has reached tens of megawatts.

2. Gas laser

Its working substance is gas. Now there are various kinds of gas atoms, ions, metal vapor, gas molecular lasers. Commonly used are carbon dioxide laser, helium neon laser and carbon monoxide laser, whose shape is like a common discharge tube, characterized by stable output, good monochromaticity, long life, but small power, low conversion efficiency.

3. Liquid laser

It can be divided into chelate laser, inorganic liquid laser and organic dye laser, the most important of which is organic dye laser. Its main feature is that the wavelength is continuously adjustable.

4. Semiconductor laser

It is a younger laser, and the more mature one is GaAs laser. It is characterized by high efficiency, small size, light weight and simple structure, and is suitable for carrying on airplanes, warships, tanks and infantry. It can be made into range finder and sighting device. However, the output power is small, the directivity is poor, and it is greatly affected by the ambient temperature.

is a 12-digit all-numeric code that identifies the company/product combination. The code uses a six-digit number to uniquely identify each company coupled with a five-digit number to identify each of the company’s products. The combination of these eleven digits plus a check character form the 12-digit U.P.C. number which uniquely identifies one and only one item.

is the central management and information center for manufacturers, distributors and retailers participating in the U.P.C. system. This organization is not a government agency and is an administrative council which exists specifically to develop standard product and shipping container codes, control the issuing of company identification codes, provide detailed information and to coordinate the efforts of all participants. Although membership in the UCC is voluntary it is required to obtain a U.P.C. identification number.