Transcription
IBM Acronyms & Abbreviations RSM Education LLP 2016
RSMIBM Acronyms and AbbreviationsThe most common acronyms and abbreviations used in IBM mainframe systems are listed on thefollowing pages. Please be aware there are lots more than just these!All registered or unregistered trademarks referenced in this list of acronyms and abbreviations arethe property of their respective owners.AabendAbnormal end of taskACBAccess Control Block (VSAM control block)ACF2Access Control Facility (CA’s RACF equivalent)ACFAdvanced Communications FunctionACF/VTAMAdvanced Communications Function/Virtual Telecommunications AccessMethodACSAutomatic Class Selection (Routines used in SMS)Address SpaceAn MVS virtual area for running tasks (TCBs)AFAdvanced FunctionAOC/MVSAutomated Operations Control/MVSAPARAuthorized Program Analysis Report (used in SMP/E)AMSAccess Method Services (VSAM utility program)APFAuthorized Program Facility (For MVS authorized programs)APIApplication Programming InterfaceAPLA Programming LanguageAPPCAdvanced Program-to-Program Communication (for SNA client/serverapplications)Page 2IBM Acronyms & Abbreviations
RSMAPPLVTAM network definition statement used to define DB2 to VTAM as anapplication program using SNA LU 6.2 protocolsAPPNAdvanced Peer to Peer NetworkASCIIAn encoding scheme used to represent strings in many environmentsBBCSBase Catalog Structure (MVS ICF catalog)BFPBuilt-in FunctionsBLOBBinary Large ObjectBMPBatch Message Program (IMS)BMSBasic Mapping Support (CICS)BPAMBasic Partitioned Access Method (MVS libraries)BPIBytes per inchbpsBits per second (Note: bits)BPSBytes per secondBSCBinary Synchronous Control (network links)BTAMBasic Telecommunications Access Method (networks old)BSAMBasic Sequential Access Method (MVS access method)BSDSBootstrap data setIBM Acronyms & AbbreviationsPage 3
RSMCCAControl Area (VSAM)CacheBuffer storage in processor which speeds up processingCAFCall Attachment FacilityCBIPOCustom Built Installation Productivity OptionCCSIDCoded Character Set IdentifierCDBCommunications databaseCE(IBM) Customer EngineerCECCentral Electronic Complex (e.g. zSeries machine)CIControl Interval (VSAM)CICSCustomer Information Control System (IBM terminal monitor product e.g.CICS/TM)CICSPlexCICS complexCIDFControl Interval Definition Field (part of a CI)CKDCount-Key-Data (part of MVS disk architecture)CLISTCommand List (MVS interpretive programming language)CLOBCharacter Large ObjectCLPACreate Link Pack Area (MVS area for operating system code)CMCICS MonitoringCOBOLCommon Business Orientated LanguageCPCCentral Processor Complex (same as CEC)CPUCentral Processing UnitPage 4IBM Acronyms & Abbreviations
RSMCRCCommand Recognition CharacterCRCRConditional Restart Control RecordCS(1) Central Storage; (2) cursor stabilityCSACommon System Area (MVS area for common data)CSDCICS System Definition FileCSPCross System ProductCSUCustomer Set UpCTCursor tableCTCChannel to ChannelCTCAChannel to Channel AdaptorCUControl UnitDDDump (of memory)DAMDirect Access MethodDASDDirect Access Storage Device (Disk)DB2Database 2 (IBM’s relational data base)DB2IDatabase 2 InteractiveDB2 PMDATABASE 2 Performance MonitorDB2 UDBDatabase 2 Universal Database (IBM’s multi-platform relational database)DBADatabase AdministratorIBM Acronyms & AbbreviationsPage 5
RSMDBADMDatabase AdministrationDBCLOBDouble-byte Character Large ObjectDBCSDouble-byte Character SetDBCTRLData Base ControlDBDDatabase DescriptorDBEDITData Base Edit FacilityDBIDDatabase IdentifierDBMAINTData Base MaintenanceDBMSData Base Management SystemDBPDynamic (Transaction) Backout ProgramDBRMDatabase Request ModuleDBRCDatabase Recovery Control (IMS)DBADMDatabase AdministrationDBCTRLDatabase ControlDBEDITDatabase Edit FacilityDBMAINTDatabase MaintenanceDBRMDatabase Request ModuleDCFDocument Composition FacilityDCLData Control LanguageDCLGENDeclarations GeneratorDCMData Manipulation LanguagePage 6IBM Acronyms & Abbreviations
RSMDCTDestination Control TableDDLData Definition LanguageDDFDistributed Data FacilityddnameData definition nameDFSMS/dssData Facility SMS/data set ServicesDFSMS/dfpData Facility SMS/data facility product (storage facilities within MVS)DFSMS/hsmHierarchical Storage Manager (IBM storage product)DIPData Interchange ProgramDITTOData Interfile Transfer Testing and Operations utilityDL/IData Language/One (for accessing IMS data bases)DLSDevice Level Selection (old disk related feature)DLSEDevice Level Selection Extended (old disk related)DMS/CMSDisplay Management System/Conversation Monitor SystemDMS/VSDisplay Management System/Virtual StorageDOS/VSEDisk Operating System/Virtual Storage Extended (another OperatingSystem)DRDADistributed Relational Database ArchitectureDSN(1) The default DB2 subsystem name(2) The name of the TSO command processor of DB2 (3) The first threecharacters of DB2 module and macro namesDXTData EXTractIBM Acronyms & AbbreviationsPage 7
RSMEEBExabyte (1018, i.e. one quintillion bytes)EBCDICExtended Binary Coded Decimal Interchange Code (instead of ASCII)EDFExecution Diagnostic FacilityEIDEvent identifierEIPExec Interface ProgramEOJEnd of JobEOMEnd of memoryEOTEnd of taskEREPEnvironmental Recording, Editing and Printing program (for recordingerrors)ESExpanded Storage (not available in z/OS)ESDSEntry Sequenced Data Set (VSAM access method)ESAEnterprise Systems Architecture (as in MVS ESA)ESCCESCON ConvertorESCDESCON Director (dynamic switch)ESCMESCON Manager (MVS program for managing ESCON)ESCONEnterprise System Connection Architecture (fibre optic channels)ESDSEntry Sequenced Data Set (VSAM sequential access)ESMExternal Storage ManagerPage 8IBM Acronyms & Abbreviations
RSMFFBAFixed Block Architecture (the only type of disk today)FCBForms Control Buffer (JES printing)FCPFile Control ProgramFCTFile Control TableGGBGigabyte (1 073 741 824 bytes)GBPGroup Buffer PoolGCSGroup Control System (VM)GDDMGraphical Data Display Manager (old support for graphics terminals)GDPSGlobally Dispersed Parallel SysplexGMLGeneralised Markup LanguageGRAFGraphics device (i.e. 3270)GRSGlobal Resource Serialisation (for serializing on resources)GTFGeneralized Trace Facility (for tracing problems)HHDBVHost Data Base ViewHPOHigh Performance OptionHSMHierarchical Storage Management (also called DFSMS/hsm)IBM Acronyms & AbbreviationsPage 9
RSMIICCFInteractive Computing and Control FacilityICEInterconnect Communication ElementICFIntegrated Catalog Facility (MVS catalogs)ICPInterval Control ProgramICRFIntegrated Cryptographic Feature (for encryption)IDCAMSAn IBM program used to process AMS commands (VSAM Utility program)IDCAMS LISTCATA facility for obtaining information contained in the ICF catalogIFCIDInstrumentation facility component identifierIFIInstrumentation facility interfaceIFPIMS Fast PathIFSInteractive File SharingIISInteractive Instructional SystemIIPSInteractive Instructional Presentation SystemIMInstallation ManagementIMLInitial Microcode Load (load microcode prior to IPL)IMSInformation Management System (IMS/DB & IMD/DC)IMS DBInformation Management System/Data BaseIMS DCInformation Management System/DataCommunications (equivalent toIMS TM)IMS TMInformation Management System Transaction Manager (equivalent toIMS DC)Page 10IBM Acronyms & Abbreviations
RSMIMS/VSInformation Management System/Virtual StorageI/OInput/OutputIPCSInteractive Problem Control System (for MVS dump analysis)IPFInteractive Productivity FacilityIPLInitial Program Load (bringing up MVS)IRCInter Region CommunicationIRLMInternal resource lock manager (for DB2 & IMS)ISCInter System CouplingISMFInteractive Storage Management Facility (MVS storage management tool)ISOInternational Standards OrganizationISPFInteractive System Productivity Facility (panels to aid using TSO)ISQLInteractive Structured Query LanguageIVFImage View FacilityIWSIntelligent Workstation Support (VSE)IX/370UNIX/370 (VM)JJCLJob Control Language (for batch jobs)JECLJob Entry Control Language (JCL for JES)JES2Job Entry Subsystem 2JES3Job Entry Subsystem 3IBM Acronyms & AbbreviationsPage 11
RSMKKBKilobyte (1000 bytes)Kb/secThousand bytes per secondKSDSKey Sequenced Data Set (VSAM key access)LLCIDLog control interval definitionLDMLogical Data ManagerLDSLinear Data Set (VSAM access)L-lockLogical lockLOBLarge objectLPARLogical Partition (run multiple operating systems)LRECPLogical recovery pendingLRHLog record headerLRSNLog record sequence numberLSILarge scale integrationLUWLogical unit of workLEWLinux, UNIX and WindowsLUWIDLogical unit of work identifierPage 12IBM Acronyms & Abbreviations
RSMMMASMulti Access Spool (JES systems sharing spool)MBMegabyte (1,048,576 bytes)MCTMonitor Control TableMLPAModified link pack area (area for testing MVS exits etc.)MPGMultiple Preferred GuestsMPPMessage Processing Programs (IMS)MROMultiple Region OperationMSSMass Storage SubsystemMTOMaster terminal operatorMVSMultiple Virtual StorageMVS/ESAMultiple Virtual Storage/Enterprise Systems Architecture (old MVS)MVS/XAMultiple Virtual Storage/Extended Architecture (very old MVS)NNIDNetwork IDNRENetwork Recovery ElementNCPNetwork Control Program (no longer used)NJENetwork Job Entry (for connecting JES MASs)NJPNetwork Job ProcessingNLDMNetwork Logical Data ManagerNPDANetwork Problem Determination ApplicationIBM Acronyms & AbbreviationsPage 13
RSMNTONetwork Terminal OptionOOASNOrigin Application Schedule NumberOBIDData OBject IDentifierOCCFOperator Communication Control FacilityOLTEPOnLine Test Executive ProgramOPCOperations Planning and Control/ESA (now Tivoli Workload SchedulerTWS)OS/390Operating System/390 (now z/OS)OSFOpen Software Foundation, IncPPAProgram Attention (3270 keys)PAFProcessor Availability FacilityParallel SysplexA set of MVS systems that communicate and cooperate with each otherthrough multi-system hardware components and software services.PCPersonal ComputerPCBProgram Control Block (DL/1)PCTProgram Control Table (CICS)PDSPartitioned Data Set (accessed via BPAM)PDSENew version of PDS (co-exists with PDS)PEPPartitioned Emulation Program (defunct)Page 14IBM Acronyms & Abbreviations
RSMPFProgram Function (3270 keys)PL/IProgramming Language/1PLTProgram List Table (CICS)PMAPreferred Machine AssistPPT(1) Processing Program Table (in CICS)(2) Program Properties Table (inMVS)PRPQProgramming Request for Price QuotationPR/SMProcessor Resource/System Manager (allows LPARs)PSPersonal SystemPSBProgram Specification Block (DL/1)PUTProgram Update TapePTFProgram Temporary Fix (not always temporary fixes to MVS)QQMFQuery Management FacilityQSAMQueued Sequential Access Method (MVS sequential access method fortape & disk)RRACFResource Access Control Facility (MVS security product)RASReliability, Availability and ServiceabilityRBARelative Byte Address (used in VSAM)RCTResource Control Table (CICS)IBM Acronyms & AbbreviationsPage 15
RSMRDBRelational DataBaseRDBMSRelational DataBase Management SystemRDBNAMRelational DataBase NAMeRDFRecord Definition Field (used in a VSAM CI)RDOResource Definition OnlineRECPRECovery PendingREORPREORG PendingRESTPRESTart PendingREXXRestructed EXtended eXecutorRIDRecord IDentifierRJERemote Job Entry (JES remote workstation support)RLFResource Limit FacilityRMFResource Measurement Facility (MVS product for performance reporting)RMIDResource Manager IDentifierRORead-Only accessROCFRemote Operator Console FacilityROWIDROW IDentifierRPGReport Program GeneratorRPQRequest for Price QuotationRRDSRelative Record Data Set (VSAM direct access)RREResidual Recovery Entry (in IMS)Page 16IBM Acronyms & Abbreviations
RSMRRSAFRecoverable Resource Manager Services Attachment FacilityRSRead StabilityRSCSRemote Spooling Communications SubsystemRSFRemote Support FacilityRSM(1) MVS Real Storage ManagerRTTResource Translation TableSSAMSequential Access Method (BSAM, QSAM & ESDS)SBCSSingle-Byte Character SetSCESystem Control ElementSCPSystem Control ProgramSDStorage Director (3990 type)SDFScreen Definition FacilitySDLCSynchronous Data Link ControlSDSFSpool Display and Search Facility (JES product for displaying spool outputand submitting operator commands)SIPO/ESystem Installation Productivity Option/ExtendedSITSystems Initialisation TableSMFSystem Management Facility (also SMP/E for maintaining MVS andrelated products)SMP/ESystem Modification Program/ExtendedIBM Acronyms & AbbreviationsPage 17
RSMSMS(1) Storage Management Subsystem (product DFSMS/MVS) or(2) System Managed Storage (concept)SNASystems Network ArchitectureSNISNA Network InterconnectionSNTSign-oN Table (CICS)SPSystem ProductSPOOLSimultaneous Peripheral Operations OnLine (print output)SPUFISQL Processor Using File InputSQLStructured Query LanguageSQLCASQL Communication AreaSQLDASQL Descriptor AreaSQL/DSStructured Query Language/Data SystemSRMSystem Resource Manager (now part of WLM)SRTSystem Recovery TableSVAShared Virtual AreaSSISubSystem Interface (in MVS)SSMSubSystem MemberSYS1.LOGRECA service aid that contains important information about program andhardware errors (see EREP)SYSADMSYStem ADMinistrationSYSOPRSYStem OPeratoRSysplexSYStem complexPage 18IBM Acronyms & Abbreviations
RSMTTAFTerminal Access FacilityTBTerabyte (1,099,511,627,776 bytes)TCAMTelecommunications Access MethodTCBTask control block (in MVS)TCMThermal Conduction ModuleTCPTerminal Control ProgramTCTTerminal Control TableTCTTETerminal Control Table Terminal EntryTDTransient DataTDPTransient Data ProgramTDISKTemporary MiniDISK (VM)TIOATerminal Input/Output AreaTMPTerminal Monitor ProgramTODTime of Day ClockTPTeleprocessingTRNToken Ring NetworkTRTTrace TableTSTemporary StorageTSOTime Sharing Option (see ISPF)TSO/ETime Sharing Option/ExtendedIBM Acronyms & AbbreviationsPage 19
RSMTWATransaction Work AreaTWSTivoli Workload Manager (formerly known as OPC)UUCSUniversal Character SetUDFUser-Defined FunctionUDTUser-defined data type (in DB2 for OS/390 and z/OS, the term distincttype is used instead of user-defined data type)UPSIUser Program Switch IndicatorUR(1) Uncommitted Read(2) Unit RecordUREUnit of Recovery ElementURIDUnit of Recovery IDUTUtility-only accessVVAEVirtual Address Extension (VSE)VDUVisual display unitVMVirtual Machine (Facility/370)VM/ESAVM/Enterprise Systems ArchitectureVM/HPOVM/High Performance OptionVM/ISVM/Integrated SystemVM/ISFVM/Intersystem FacilitiesPage 20IBM Acronyms & Abbreviations
RSMVM/XAVM/Extended ArchitectureVMAPVM Monitor Analysis ProgramVPSVirtual Printer SupportVPWVirtual Paper Writerv.r.mversion.release.modificationVSVirtual StorageVSAMVirtual Storage Access MethodVSEVirtual Storage ExtendedVTAMVirtual Telecommunications Access Method (SNA MVS component)VTOCVolume Table Of Contents (disk information)VVDSVSAM Volume Data Set (ICF catalog component)WWLMWorkload Manager (for managing MVS performance)WTOWrite To OperatorWTORWrite To Operator (WTO) with ReplyIBM Acronyms & AbbreviationsPage 21
RSMXXAExtended Architecture (see MVS/ESA)XCFCross System Coupling Facility (for Sysplex)XDFExtended Distance Feature (for remote disk copy)XESCross System Extended Services (for Sysplex)XMSCross Memory Services (Inter address space communication)XRFExtended Recovery FacilityXSExternal SecurityZz/OSLatest version of IBM’s MVS Operating System running on z/Architecture.Page 22IBM Acronyms & Abbreviations
The most common acronyms and abbreviations used in IBM mainframe systems are listed on the following pages. Please be aware there are lots more than just these! . IPL Initial Program Load (bringing up MVS) IRC Inter Region Communication IRLM Internal resource lock manager (for DB2 & IMS) ISC Inter System Coupling
