SNA NRJE Node Managers Guide (30292-90007)

257
Logical Unit Type 3 (LU.T3): A
session between an application
program and a printer. IBM`3270
Data Stream Capability
(3270`DSC) is provided. Many
devices support both LU.T1 and
LU.T3 print requests.
logical writer: A logical printer
or a logical punch.
LU: See Logical Unit.
LU class: See Logical Unit
class.
LU-LU session: A connection
between two LUs.
LU.T1: See Logical Unit
Type 1.
LU.T2: See Logical Unit
Type 2.
LU.T3: See Logical Unit
Type 3.
M
modem: An acronym for
MODulator-DEModulator. A
modem converts serial digital
data from a transmitting
terminal into a form suitable for
transmission over the analog
telephone channel. A second
modem reconverts this signal to
serial digital data for acceptance
by the receiving terminal. Bell
201, 208, and 209 modems are
used for synchronous data
transfer.
MPE: See MultiProgramming
Executive.
Multiple Virtual Storage
(MVS): An IBMoperating system
that is an extension of OS/MVT.
MVS is also known as OS/VS2
Release 2. IBM enhanced the
original version of MVS; these
enhanced systems include
MVS/SP (Multiple Virtual
Storage/System Product) and
MVS/XA (Multiple Virtual
Storage/eXtended Architecture).
MultiProgramming Executive
(MPE): The Hewlett-Packard
operating system for the HP 3000
computer. MPE consists of
programs that handle exchanges
between HP terminals, printers,
and executing programs and the
internal HP 3000
Communications Software.
MVS: See Multiple Virtual
Storage.
N
Native Language Support
(NLS): A Hewlett-Packard
product that provides the
HP 3000 with the features
necessary to produce localized
application programs for end
users without reprogramming for
each language or country.
NAU: See Network
Addressable Unit.
NCP: See Network Control
Program.