IBM OS/390 User Manual
purpose of modifying or extending the functions of the
IBM software product.
IBM software product.
integer date. A count of days since a specified date.
Various IBM software products have defined integer
dates as follows:
Various IBM software products have defined integer
dates as follows:
Language/Product
Days Since
C
1969-Dec-31
COBOL
1600-Dec-31
Language Environment
1582-Oct-14
MVS/CICS/DB2
1899-Dec-31
integrity. The protection of systems, programs, and
data from inadvertent or malicious destruction or
alteration. See application integrity, data integrity,
system integrity.
data from inadvertent or malicious destruction or
alteration. See application integrity, data integrity,
system integrity.
Interactive Computing and Control Facility (ICCF). An
IBM licensed program that makes the services of a
VSE-controlled computing system available to
authorized display station users.
IBM licensed program that makes the services of a
VSE-controlled computing system available to
authorized display station users.
interactive partition. In VSE, an area of virtual
storage dynamically allocated for the purpose of
processing a job that was submitted interactively from
a terminal.
storage dynamically allocated for the purpose of
processing a job that was submitted interactively from
a terminal.
Interactive Problem Control System (IPCS). A
component of VM that permits online problem
management, interactive problem diagnosis, online
debugging for disk-resident CP abend dumps, problem
tracking, and problem reporting.
component of VM that permits online problem
management, interactive problem diagnosis, online
debugging for disk-resident CP abend dumps, problem
tracking, and problem reporting.
Interactive System Productivity Facility. An IBM
licensed program that serves as a full-screen editor
and dialogue manager. Used for writing application
programs, it provides a means of generating standard
screen panels and interactive dialogues between the
application programmer and terminal user.
licensed program that serves as a full-screen editor
and dialogue manager. Used for writing application
programs, it provides a means of generating standard
screen panels and interactive dialogues between the
application programmer and terminal user.
internal side. The creator or manipulator of a data
entity. Used in this document to mean a module or
routine that externalizes a 2- or 4-digit-year format
entity to another module or routine.
entity. Used in this document to mean a module or
routine that externalizes a 2- or 4-digit-year format
entity to another module or routine.
Internet. A wide area network connecting thousands
of disparate networks in industry, education,
government, and research. The Internet network uses
TCP/IP as the standard for transmitting information.
of disparate networks in industry, education,
government, and research. The Internet network uses
TCP/IP as the standard for transmitting information.
interoperability. The capability to communicate,
execute programs, or transfer data among various
functional units in a way that requires the user to
have little or no knowledge of the unique
characteristics of those units.
execute programs, or transfer data among various
functional units in a way that requires the user to
have little or no knowledge of the unique
characteristics of those units.
IOCDS. An input/output configuration data set
(IOCDS) contains different configuration definitions for
the selected processor. Only one IOCDS is used at a
time. The IOCDS contains I/O configuration data on
the files associated with the processor controller on
(IOCDS) contains different configuration definitions for
the selected processor. Only one IOCDS is used at a
time. The IOCDS contains I/O configuration data on
the files associated with the processor controller on
the host processor, as it is used by the channel
subsystem. The CSS uses the configuration data to
control I/O requests. The IOCDS is built from the
production IODF.
subsystem. The CSS uses the configuration data to
control I/O requests. The IOCDS is built from the
production IODF.
IOCP. An IOCP (I/O configuration program) is the
hardware utility that defines the hardware I/O
configuration to the channel subsystem. For this
definition IOCP retrieves information about the
following: the channel paths in the processor complex,
control units attached to the channel paths, and I/O
devices assigned to the control unit.
hardware utility that defines the hardware I/O
configuration to the channel subsystem. For this
definition IOCP retrieves information about the
following: the channel paths in the processor complex,
control units attached to the channel paths, and I/O
devices assigned to the control unit.
IODF. An IODF (input/output definition file) is a
VSAM linear data set that contains I/O definition
information. This information includes processor I/O
definitions (formerly specified by IOCP input streams)
and operating system I/O definitions (formerly
specified by MVSCP input streams). A single IODF can
contain several processor and several operating
system I/O definitions.
VSAM linear data set that contains I/O definition
information. This information includes processor I/O
definitions (formerly specified by IOCP input streams)
and operating system I/O definitions (formerly
specified by MVSCP input streams). A single IODF can
contain several processor and several operating
system I/O definitions.
IPDS. Intelligent Printer Data Stream. An architected
host-to-printer data stream that contains both data
and controls defining how the data is to be presented.
host-to-printer data stream that contains both data
and controls defining how the data is to be presented.
IPL. Initial Program Load. (1) The initialization
procedure that causes an operating system to
commence operation. (2) The process by which a
configuration image is loaded into storage, as at the
beginning of a work day or after a system malfunction
or as a means to access updated parts of the system.
(3) The process of loading system programs and
preparing a system to run jobs.
procedure that causes an operating system to
commence operation. (2) The process by which a
configuration image is loaded into storage, as at the
beginning of a work day or after a system malfunction
or as a means to access updated parts of the system.
(3) The process of loading system programs and
preparing a system to run jobs.
J
JCL. Job Control Language. A sequence of
commands used to identify a job to an operating
system and to describe a job
commands used to identify a job to an operating
system and to describe a job
′
s requirements.
JECL. Job Entry Control Language - also referred to
as JES2 or JES3 control statements that are
submitted with a job
as JES2 or JES3 control statements that are
submitted with a job
′
s JCL.
JES. Job Entry Subsystem. A system facility for
spooling, job queueing, and managing the scheduler
work area.
spooling, job queueing, and managing the scheduler
work area.
job accounting. A function that collects information
pertaining to how a job uses system resources.
pertaining to how a job uses system resources.
job control. In VSE, a program called into storage to
prepare each job or job step to be run. Some of its
functions are to assign I/O devices to symbolic
names, set switches for program use, log (or print)
job control statements, and fetch the first phase of
each job step.
prepare each job or job step to be run. Some of its
functions are to assign I/O devices to symbolic
names, set switches for program use, log (or print)
job control statements, and fetch the first phase of
each job step.
job control language (JCL). A control language used
to identify a job to an operating system and to
describe the job
to identify a job to an operating system and to
describe the job
′
s requirements.
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