Symbol MC9090G User Manual page 232

Glossary - 8 MC909X Mobile Computer User Guide
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.
Light Emitting Diode. See LED.
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.
Misread (Misdecode). A condition which occurs when the data output of a reader or interface controller does not agree with
the data encoded within a bar code symbol.
Mobile Computer. In this text, mobile computer refers to the Symbol Series 9090 wireless portable computer. It can be set
up to run as a stand-alone device, or it can be set up to communicate with a network, using wireless radio technology.
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).
NVM. Non-Volatile Memory.