Glossary - 6 WT4070/90 Wearable Terminal Integrator Guide
L
laser scanner. A type of bar code reader that uses a beam of laser light.
LASER. (Light Amplification by Stimulated Emission of Radiation) The laser is an intense light source. Light from a laser is
all the same frequency, unlike the output of an incandescent bulb. Laser light is typically coherent and has a high energy
density.
LCD. See Liquid Crystal Display.
LEAP. (Lightweight Extensible Authentication Protocol) A mutual authentication method that uses a username and
password system.
LED Indicator. A semiconductor diode (LED - Light Emitting Diode) used as an indicator, often in digital displays. The
semiconductor uses applied voltage to produce light of a certain frequency determined by the semiconductor's particular
chemical composition.
Liquid Crystal Display (LCD). A display that uses liquid crystal sealed between two glass plates. The crystals are excited
by precise electrical charges, causing them to reflect light outside according to their bias. They use little electricity and
react relatively quickly. They require external light to reflect their information to the user.
M
MC. Mobile computer.
MDN. (Mobile Directory Number) The directory listing telephone number that is dialed (generally using POTS) to reach a
mobile unit. The MDN is usually associated with a MIN in a cellular telephone -- in the US and Canada, the MDN and
MIN are the same value for voice cellular users. International roaming considerations often result in the MDN being
different from the MIN.
MIL. 1 mil = 1 thousandth of an inch.
MIN. (Mobile Identification Number) The unique account number associated with a cellular device. It is broadcast by the
cellular device when accessing the cellular system.
MS CHAP. (Microsoft Challenge Handshake Authentication Protocol) is the Microsoft version of CHAP and is an extension
to RFC 1994. Like the standard version of CHAP, MS-CHAP is used for PPP authentication; in this case, authentication
occurs between a PC using Microsoft Windows NT or Microsoft Windows 95 and a Cisco router or access server acting
as a network access server (NAS).
N
Nominal. The exact (or ideal) intended value for a specified parameter. Tolerances are specified as positive and negative
deviations from this value.
Nominal Size. Standard size for a bar code symbol. Most UPC/EAN codes are used over a range of magnifications (e.g.,
from 0.80 to 2.00 of nominal).
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