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Multiple Virtual Storage (MVS)
IBM's Multiple Virtual Storage, consisting of MVS/System Product Version 1 and the
MVS/370 Data Facility Product operating on a System/370 processor. (IBM).
Multiple Virtual Storage/Enterprise Systems Architecture (MVS/ESA)
An extended version of IBM's MVS.
MVS
See Multiple Virtual Storage
MVS/ESA
See Multiple Virtual Storage/Enterprise Systems Architecture
N
network
An arrangement of nodes and branches that connects data processing devices to one
another through software and hardware links to facilitate information interchange.
O
offline
Neither controlled by, nor communicating with, a computer. (IBM)
online
Pertaining to the operation of a functional unit when under the direct control of the
computer. (T)
operator control panel
A functional unit that contains switches used to control all or part of a computer and
possibly the indicators giving information about its functioning. (T)
P
performance
One of two major factors on which the total productivity of a system depends.
Performance is largely determined by a combination of throughput, response time,
and availability. (IBM)
port
A specific communications end point within a host. A port is identified by a port
number. (IBM)
R
R/W
Read/write
read/write head
The data sensing and recording unit of a tape drive. (IBM)
Glossary 107
December 2012
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