O

OASN
See origin application schedule number (OASN)
Object Management Group (OMG)
A non-profit consortium whose purpose is to promote object-oriented technology and the standardization of that technology. The Object Management Group was formed to help reduce the complexity, lower the costs, and hasten the introduction of new software applications.
object module
A compiled or assembled program, the output of a compiler or assembler. Before execution, object modules must be processed by the linkage editor to produce a load module. See source program, load module (LMOD), compiler, assembler, linkage editor.
Object Request Broker (ORB)
A CORBA system component that acts as an intermediary between the client and server applications. Both client and server platforms require an ORB; each is tailored for a specific environment, but support common CORBA protocols and IDL.
OIDCARD
A small card with a magnetic stripe encoded with unique characters and used to verify the identity of a terminal operator to RACF.
OLDS
See online log data set (OLDS).
OMG
See Object Management Group (OMG).
online
Pertaining to a user's access to a computer via a terminal.
online log data set (OLDS)
A data set on direct access storage that contains the log records written by DBCTL. When the current OLDS is full, DBCTL continues logging to a further available OLDS.
open key storage
In MVS storage protection, storage with storage key 9. called key-9 storage. In open key storage, fetch and store operations are permitted, regardless of the access key. CICS user-key storage is in MVS open key storage.
open system
A system that implements specified common standards across different computer vendors. Implementing open systems standards for communications allows computers from different vendors to communicate with each other.
Open Systems Interconnection
The interconnection of open systems in accordance with specific standards of the International Organization for Standardization (ISO).
operating system (OS)
A collection of system programs that control the overall operation of a computer system.
Operating System/2 (OS/2)
An operating system for IBM Personal System/2 (PS/2) and IBM-compatible personal computers.
Operating system/400 (OS/400)
An operating system for the IBM Application System/400 (AS/400) machines. OS/400 includes intergrated transaction processing facilities.
Operating System/Virtual Storage (OS/VS)
A compatible extension of the IBM System/360 Operating System that supports relocation hardware and the extended control facilities of System/360. OS/VS is the first step in an evolving sequence of which the following steps are MVS/370, MVS/XA;, and MVS/ESA.
operator identification (OPID)
A 1-to-3 character code that is assigned to each operator and is stored in the operator's terminal entry in the CICS terminal control table (TCTTE) when the operator signs on. In CICS Transaction Server, an operator identification code defined in the CICS segment of a RACF user profile, using the OPIDENT operand of the ADDUSER command. If a release of RACF earlier than RACF 1.9 is in use, opids must be defined in the signon table (SNT). In CICS/VSE, an operator identification code defined in the CICS signon table (SNT) using the OPIDENT parameter of the DFHSNT TYPE=ENTRY macro.
OPID
See operator identification (opid OPID).
OPTB
See output parameter text block (OPTB)
ORB
See Object Request Broker (ORB).
orderly disconnection
An option for disconnecting CICS from DBCTL using the CDBC transaction. It allows all existing DBCTL tasks to be completed before CICS is disconnected from DBCTL. See also immediate disconnection.
origin application schedule number (OASN)
An IMS recovery element in an external subsystem (for example, DB2). The OASN is equivalent to the unit-of-recovery ID in the CICS recovery token. It is coupled with the IMS ID to become the recovery token for LUWs in external subsystems.
orphan lock
An orphan lock is an RLS lock that is held by VSAM RLS but unknown to any CICS region. An RLS lock becomes an orphan lock if it is acquired from VSAM by a CICS region that fails before it can log it. A VSAM interface enables CICS, during an emergency restart, to detect the existence of these locks and release them.
OS
See operating system (OS).
OS/400
See Operating system/400.
OSAM
See overflow sequential access method (OSAM).
OS/VS
See Operating System/Virtual Storage (OS/VS)
outage
A failure of the CICS system, or planned down time for maintenance or upgrade.
outboard formatting
A technique for reducing the amount of line traffic between a host processor and an attached subsystem. The reduction is achieved by sending only variable data across the network. This data is combined with constant data by a program within the subsystem. The formatted data can then be displayed.
outbound
(1) In communication, pertaining to data that is sent to the network. See also inbound.
(2) In FEPI and CICS, data sent by a program to somewhere else. From the point-of-view of the back-end system, this data is inbound or input from a terminal.
output parameter text block (OPTB)
In CICS/VSE, in VSE/POWER's spool-access support, information that is contained in an output queue record if a * $$ LST or * $$ PUN statement includes any user-defined keywords that have been defined for autostart.
overflow sequential access method (OSAM)
In IMS, a data management access method that handles data overflow from ISAM.
overlapped keystroking
A means of eliminating the delay experienced by operators when performing repetitive data entry tasks by using two BMS partitions to display two copies of the same data entry panel. After filling the first panel, the operator presses ENTER to transmit the data and moves into the second partition. While CICS is processing the input from the first partition, the operator can continue to input data in the second partition.
overlay map
A technique used with BMS to achieve simulated windows. See also canned map and base map.
overseer
A CICS program used with XRF, that runs in its own address space and provides status information about the active and alternate CICS systems. You can use it to automate a restart of failed regions.
owner
The user or group that creates a profile, or is named the owner of a profile. The owner can modify, list, or delete the profile.
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