## CP Data Areas and Control Blocks
Ver 7, Rel 2.0

#### Control Blocks, A to Z $ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | Programming Interface Information: These web pages primarily document information that is NOT intended to be used as a Programming Interface of z/VM. These web pages also document intended Programming Interfaces that allow the customer to write programs to obtain the services of z/VM. This information is identified where it occurs by an introductory statement.

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       $Top of page  $AMSG        - Relocation mapping for HCPAMSG
      $APMBK       - Relocation mapping for HCPAPMBK
      $BITMP       - Relocation mapping for HCPBITMP
      $BKIBK       - Relocation mapping for HCPBKIBK
      $CCTBK       - Relocation mapping for HCPCCTBK
      $CHCBK       - Relocation mapping for HCPCHCBK
      $CRWBK       - Relocation mapping for HCPCRWBK
      $DVLBK       - Relocation mapping for HCPDVLBK
      $FCLBK       - Relocation mapping for HCPFCLBK
      $FINBK       - Relocation mapping for HCPFINBK
      $GSDBK       - Relocation mapping for HCPGSDBK
      $HCIBK       - Relocation mapping for HCPHCIBK
      $INIBK       - Relocation mapping for initialisation
      $IOCM        - Relocation mapping for HCPIOCM
      $IORBK       - Relocation mapping for HCPIORBK
      $IPQBK       - Relocation mapping for HCPIPQBK
      $IPRML       - Relocation mapping for IPARML
      $IUCVB       - Relocation mapping for HCPIUCVB
      $MCVBK       - Relocation mapping for HCPMCVBK
      $MDGBK       - Relocation mapping for HCPMDGBK
      $MSGBK       - Relocation mapping for HCPMSGBK
      $MSTBK       - Relocation mapping for HCPMSTBK
      $MSVBK       - Relocation mapping for HCPMSVBK
      $NETWK       - Relocation mapping for virtual NIC
      $PDEBK       - Relocation mapping for HCPPDEBK
      $PPFBK       - Relocation mapping for HCPPPFBK
      $PPRBK       - Relocation mapping for post-processing
      $PROBK       - Relocation mapping for HCPPROBK
      $PSGBK       - Relocation mapping for HCPPSGBK
      $PXIBK       - Relocation mapping for HCPPXIBK
      $RTVBK       - Relocation mapping for HCPRTVBK
      $SCABK       - Relocation mapping for HCPSCABK
      $SDNX        - Relocation mapping for HCPSDNX
      $SFXBK       - Relocation mapping for HCPSFXBK
      $SIEBK       - Relocation mapping for HCPSIEBK
      $SSHBK       - Relocation mapping for the SSHBK array
      $TPCBK       - Relocation mapping for HCPTPCBK
      $VDATA       - Relocation mapping for miscellaneous
      $VDEV        - Relocation mapping for HCPVDEV
      $VDSBK       - Relocation mapping for HCPVDSBK
      $VFCBK       - Relocation mapping for HCPVFCBK
      $VMDBK       - Relocation mapping for HCPVMDBK
      $VPXBK       - Relocation mapping for HCPVPXBK
      $VSPBK       - Relocation mapping for HCPVSPBK
       ATop of page  AvlListAnAva - List Zone
      AvlZn        - Available List Zone
      ACABK        - Map CASBKs at beginning of VEXBK.
      ACCBK        - Initial file system access block
      ACIPARMS     - ACCESS CONTROL INTERFACE PARAMETERS
      ACOBK        - User Accounting Record Format
      ACPBK        - CP Access Pointer Block
      ACSBK        - CP Access Block
      ACTBK        - ISFC CP Application activation control block
      ADABK        - Address Space Data Array
      ADDIN        - CP ADD-on INitialization Routines
      ADEDATA      - Address Space Data Array
      ADRBK        - Automatic Device Recovery Block
      ADSR         - Symptom Record
      ADSRCMPS     - Symptom Record
      ADSRDBST     - Symptom Record
      ADSRROSD     - Symptom Record
      ADSR5ST      - Symptom Record
      AEBK         - Asynchronous Event Block
      AFFBK        - AFFinity management control BlocK
      AGEBK        - AGELIST parameter block
      ALCBK        - Access-List Control Block
      ALEBK        - Access List Entry
      ALET         - Access List Entry Token
      ALOC         - DASD VOLUME ALLOCATION BLOCK
      ALOCEXT      - DASD allocation record mapping for
      ALStats      - Available List Zone
      ALSBK        - Access List Services control block.
      ALTREC       - ALERT RECORDING RECORD
      AMSG         - Asynchronous Event Message
      AMTE         - ASIT Management Table Entry for PTRM
      AMTW         - Asynchronous Message Task Work Request
      AOFPARM      - Parameter list for HCPACUOF
      AONPARM      - Parameter list for HCPACUON
      ARDCASEC     - ARCHITECTURE DESCRIPTION BLOCK
      ARDCPSEC     - ARCHITECTURE DESCRIPTION BLOCK
      ARDFISEC     - ARCHITECTURE DESCRIPTION BLOCK
      ARDHDR       - ARCHITECTURE DESCRIPTION BLOCK
      ARDMDSEC     - ARCHITECTURE DESCRIPTION BLOCK
      ARDRSSEC     - ARCHITECTURE DESCRIPTION BLOCK
      ARDSISEC     - ARCHITECTURE DESCRIPTION BLOCK
      ARDSTSEC     - ARCHITECTURE DESCRIPTION BLOCK
      ARDVT        - ARCHITECTURE DESCRIPTION BLOCK
      AREXBK       - Queue entry containing a pending IORBK
      ARIBK        - Access Real Subsystem Information Block
      ARMGE        - Access Real Subsystem Message Entry
      ARSBK        - Access Register SaveBk sidecar
      ARSDT        - Access Real Subsystem Data Area
      ARSPL        - Access Real Subsystem Parameters
      ARUBK        - Access Real Subsystem Unsolicited
      ARUSE        - Access Real Subsystem Unsolicited
      ASBK         - Map the Associate Request Block
      ASCBK        - Address-Space-Control Block
      ASCE         - Address-Space-Control Element
      ASDBK        - Address Space Dependent Block
      ASIBK        - Address Space Information Block
      ASIZBK       - Address Space Information Block
      ASMBK        - PTRM Address Space Management Block
      ASPBK        - Active Spool File Block for *SPL
      ASRBK        - Assert monitor call parameter mapping
      ASTE         - ASN-Second-Table Entry
      ATCBK        - ATTACH COMMAND BLOCK
      A0LBK        - Diagnose A0 (subcode x'24') list entry
      A0UBK        - Diagnose A0 (subcode x'24') list entry
       BTop of page  BELBK        - Block I/O entry list
      BIOPG        - DASD Block I/O Storage Management Block
      BIOPL        - Block I/O Parameter List
      BITMP        - Bit Map Control Block
      BKIBK        - Block I/O Block for DIAGNOSE X'250'
      BLEBK        - CP application interface table ctl block
      BLEFM        - CP application interface table ctl block
      BLEHD        - CP application interface table ctl block
      BLKIO        - *BLOCKIO Device Connection Data
      BMGBK        - Bit map control block (z/architecture mode)
      BMPBK        - Bit map control block
      BMSBK        - BUFFER MANAGEMENT SERVICE CONTROL BLOCK
      BOXBK        - LOGO BLOCK
      BPLBK        - *BLOCKIO parameter list dsect
      BPQBK        - BUFFER PENDING QUEUE BLOCK
       CTop of page  CAABK        - CP-use Address space Allocation block
      CABUFFER     - Channel Adapter Buffer
      CACBK        - Virtual CTC Adapter Control Block
      CALBK        - Cluster Allocation List Block
      CAPBK        - Connection Block for Advanced Printers
      CARBK        - ISFC CP Application Request/Response
      CASBK        - Map Contiguous Available Slots
      CBIBK        - Control Block Identifiers and Lengths
      CCED         - APPC/VM CONNECTION COMPLETE EXTENDED DATA BLOCK
      CCFBK        - CPU-Measurement Counter Facility Counters
      CCHREC       - VM/XA MAPPING OF THE S/370 CHANNEL
      CCLBK        - VSwitch Counter Block
      CCTBK        - Communications Control Table
      CCWTT        - Channel Program Translation Tables
      CCWTTE       - Channel Program Translation Tables
      CFEBK        - Map the HCPIODCW resident data area
      CFGLF        - CONFIGURATION BLOCK.
      CFNLF        - CONFIGURATION NAME TABLE.
      CFREC        - *CONFIG Configuration Record
      CHABK        - CHPID activity block
      CHCBK        - CHANNEL CLASS BLOCK
      CHGBK        - External Symbol Dictionary Change Block
      CHNDX        - CHANNEL INDEXING BLOCK
      CHPBK        - SPXTAPE Channel Program Block
      CHRBK        - DEVICE / SUBCHANNEL INDEX STRUCTURE
      CINBK        - Callers information block.
      CITBK        -
      CKIBK        - SYSTEM CHECK POINT INTERFACE BLOCK
      CKPBK        - SYSTEM CHECK POINT CONTROL BLOCK
      CLNBK        - Monitor Command Line Block
      CMDBK        - Command Table Entry Block
      CMPBK        - Component Id Block
      CNNBK        - Connectivity (aka ISFC) address space
      CNODE        - Collision node for MDC hash table.
      CNTDSECT     - DSECT TO DESCRIBE COUNT FIELD
      CNUBK        - USER DATA MAPPING FOR *IDENT
      COMBK        - Console Communications Control Block
      COMBUFF      - Buffer between CSE/SSI and CP
      CONBK        - APPCVM CONNECT BLOCK
      CONDF        - Syntax statement definition area
      CONWK        - Configuration File Work Area
      COPYSYST     - Copy of Shared Systems Table
      CORBK        - CORE Control Block
      COUBK        - CPU-Counter-Set Controls
      CPABK        - CPUBK ANCHOR BLOCK
      CPCBK        - CHANNEL PROGRAM CONTROL BLOCK
      CPEBK        - CP TASK EXECUTION BLOCK
      CPECSRV      - CONNECTION PENDING EXTENDED DATA (CPED)
      CPED         - CONNECTION PENDING EXTENDED DATA (CPED)
      CPEFASI      - CONNECTION PENDING EXTENDED DATA (CPED)
      CPEFASIS     - CONNECTION PENDING EXTENDED DATA (CPED)
      CPEFCOR      - CONNECTION PENDING EXTENDED DATA (CPED)
      CPEFLUW1     - CONNECTION PENDING EXTENDED DATA (CPED)
      CPEFLUW2     - CONNECTION PENDING EXTENDED DATA (CPED)
      CPEFMH5      - CONNECTION PENDING EXTENDED DATA (CPED)
      CPEPIP       - CONNECTION PENDING EXTENDED DATA (CPED)
      CPEPIPMP     - CONNECTION PENDING EXTENDED DATA (CPED)
      CPESGIDV     - CONNECTION PENDING EXTENDED DATA (CPED)
      CPIBK        - CP information data area overlays
      CPPBK        - CP Protection Data Block
      CPTBK        - Channel program initialization block
      CPTCA        - See PLAS version for details.
      CPUBK        - CPU DATA BLOCK
      CPVOL        - System Volume List Entry
      CPVWK        - LOCK/UNLOCK Command work area
      CRDREC       - CHANNEL REPORT WORD ERROR RECORD
      CREBK        - CRYPTO APVIRT System Config Entry
      CRENTRY      - CRYPTO APVIRT System Config Entry
      CRWBK        - CHANNEL REPORT WORD BLOCK
      CSEBUFBK     - CSEBUFBK buffer layout
      CSEEBFBK     - CSL buffer block for ECKD devices
      CSEEHDBK     - CSL header record for ECKD devices
      CSEHDRBK     - CSE header record on each CSE track
      CSESCTBK     - VM/CSE SPOOL SYNCRONIZATION TRACE ENTRY
      CSESDTBK     - VM/CSE SPOOL DIAGNOSE TRACE ENTRY
      CSETTPTR     - CSE Trace Table Pointers
      CSFBK        - CHANGE SPOOL FILE ROUTINE COMMUNICATIONS BLOCK
      CSIBK        - Mappings for Diagnose x'26C'
      CSICCSTR     - Mappings for Diagnose x'26C'
      CSICPLST     - Mappings for Diagnose x'26C'
      CSICRESP     - Mappings for Diagnose x'26C'
      CSICVSTR     - Mappings for Diagnose x'26C'
      CSIGASTR     - Mappings for Diagnose x'26C'
      CSIGGSTR     - Mappings for Diagnose x'26C'
      CSIGPLST     - Mappings for Diagnose x'26C'
      CSIGRESP     - Mappings for Diagnose x'26C'
      CSIGUSTR     - Mappings for Diagnose x'26C'
      CSILPLST     - Mappings for Diagnose x'26C'
      CSIMPLST     - Mappings for Diagnose x'26C'
      CSIMRESP     - Mappings for Diagnose x'26C'
      CSIPDSTR     - Mappings for Diagnose x'26C'
      CSIPMSTR     - Mappings for Diagnose x'26C'
      CSIPNSTR     - Mappings for Diagnose x'26C'
      CSIPPLST     - Mappings for Diagnose x'26C'
      CSIPRESP     - Mappings for Diagnose x'26C'
      CSIPSSTR     - Mappings for Diagnose x'26C'
      CSIPTSTR     - Mappings for Diagnose x'26C'
      CSISISTR     - Mappings for Diagnose x'26C'
      CSISRESP     - Mappings for Diagnose x'26C'
      CSIVASTR     - Mappings for Diagnose x'26C'
      CSIVLSTR     - Mappings for Diagnose x'26C'
      CSIVMSTR     - Mappings for Diagnose x'26C'
      CSIVPLST     - Mappings for Diagnose x'26C'
      CSIVPSTR     - Mappings for Diagnose x'26C'
      CSIVRESP     - Mappings for Diagnose x'26C'
      CSIVRSTR     - Mappings for Diagnose x'26C'
      CSIVSSTR     - Mappings for Diagnose x'26C'
      CSIVTSTR     - Mappings for Diagnose x'26C'
      CSIVUSTR     - Mappings for Diagnose x'26C'
      CSIVVSTR     - Mappings for Diagnose x'26C'
      CSLPL        - Console macro parameter list
      CSPBK        - SPOOL Command Communications Block
      CSSENTRY     - IUCV System service attribute table map
      CTCBK        - ISFC Link Extension for CTCA devices
      CTCPGTBL     - ISFC Link Extension for CTCA devices
      CTF          - DASD Count, Key and Data field layout
      CTRBK        - Fast CCW Translation BlocK
      CUIBK        - CONTROL UNIT INFORMATION BLOCK
      CUIRR        - CUIR Message Task Request
       DTop of page  DALBK        - Dumped Access List Block
      DAPPC        - Directory APPCPASS Security Parameter Block
      DAWBK        - DATATRACE TYPE DATA WORKAREA
      DBCBK        - Diagnose X'BC' file descriptions
      DBCWK        - DASD Block I/O work block
      DBEBK        - ISFC Directory Broadcast entry block.
      DBHBK        - ISFC Directory Broadcast header block
      DBHCTRS      - ISFC Directory Broadcast header block
      DBHNBK       - ISFC Directory Broadcast header block
      DBIRQ        - DASD BLOCK I/O SSCH REQUEST DATA
      DCHBK        - Diagnose Control Header
      DCMPI        - Define Command Program Interface Plist
      DCPU         - Directory CPU Block
      DCRBK        - DELAYED CONNECT REQUEST BLOCK
      DCTBL        - Device Characteristics Table
      DCWBK        - Device Command Word (DCW)
      DDCBK        - Diagnose 'DC' Control Block
      DDEV         - DIRECTORY DEVICE DEFINITION BLOCK
      DDRREC       - DYNAMIC RECONFIGURATION RECORD
      DD4PARM0     - ALTERNATE USER SUPPORT INTERFACE FOR DIAG X'D4'.
      DD8PARM0     - Parameter List Dsect for HCPSFB
      DEARG        - Define Extent CCW argument mapping
      DEDBK        - Dynamic Exit Definition Block
      DEFDSECT     -
      DE4PL        - DIAGNOSE X'E4' Parameter List
      DFDA         - FBA Define Extent data area
      DFIR         - DUMP FILE INFORMATION RECORD
      DFIZ         - DUMP FILE INFORMATION RECORD
      DFIZCPU      - DUMP FILE INFORMATION RECORD
      DFMBK        - Dump file map record
      DFRMP        - DDEV Frame Map
      DFXBK        - Define Extent Parameter
      DF8PARM      - Diagnose X'F8' Parameter List
      DGDBK        - Directory generic data block
      DGFBK        - Directory FCP IPL block
      DGNBK        - Diagnose Table Entry Block
      DGRPM        - Directory POSIX group member block
      DGSBK        - Directory generic string block
      DG0BK        - NETWORK DIAGNOSE x'2A8' Request Blocks
      DG1BK        - NETWORK DIAGNOSE x'2A8' Request Blocks
      DG2BK        - NETWORK DIAGNOSE x'2A8' Request Blocks
      DG4BK        - NETWORK DIAGNOSE x'2A8' Request Blocks
      DG5BK        - NETWORK DIAGNOSE x'2A8' Request Blocks
      DHDR         - Directory header block
      DIDBK        - Directory Identity Virtual Machine Block
      DIDENTRY     - Directory Identity Virtual Machine Block
      DIOBK        - Dynamic I/O control block.
      DIUCV        - DIRECTORY IUCV BLOCK
      DLJBK        - Mapping of HCPDLJ and HCPDLK Common Area
      DLSBK        - Data Link State Block
      DLUBK        - Dynamic Load/Unload Block
      DMPINREC     - VM/370 SYSTEM PRODUCT DUMP INFORMATION RECORD
      DNSA         - DIRECTORY NSS/DCSS AUTHORIZATION BLOCK
      DNXBK        - Directory index block
      DPLID        - DIAGNOSE Parameter List Identifier
      DPSBK        - Dasd Programming Services Block
      DRBK         - CP Data Request Block
      DRBLK        - NETWORK DIAGNOSE x'2A8' Request Blocks
      DRCBK        - DASD RECOVERY BLOCK
      DRMBK        - Delayed Response Message Block
      DRWBK        - DASD Read/Write Channel Program Block
      DSCBK        - Demand Scan Control Block
      DSFBK        - Demand Scan Information Block
      DSGR         - Directory supplementary group IDs block
      DSIBK        - Dump Space Information Area
      DSLBK        - DISJOINT STORAGE LIST
      DSSBK        - Data Space Services Block.
      DSTBK        - Parameter / work area for DEFINE STORAGE
      DSUBK        - Demand Scan User Data Block
      DSVBK        - DiSpatch Vector BlocK
      DS1LABEL     - Mapping for VTOC DSCB's
      DS4LABEL     - Mapping for VTOC DSCB's
      DS5LABEL     - Mapping for VTOC DSCB's
      DTCBK        - Detach Command Control Block
      DTFBK        - DATATRACE TRACE RECORD FORMAT BLOCK
      DTFXRHDR     - DATATRACE TRACE RECORD FORMAT BLOCK
      DTLBK        - DATALINK SOURCE
      DUCT         - Dispatchable Unit Control Table
      DUNDX        - DIRECTORY USER INDEX BLOCK
      DVIENTRY     - DASD Virtual I/O Parameter List
      DVIOP        - DASD Virtual I/O Parameter List
      DVLHEAD      - Device List Structures
      DVLRANGE     - Device List Structures
      DVMD         - GUEST VIRTUAL MACHINE DIRECTORY BLOCK
      DVTRK        - DASD Virtual TRacK list node
      DXDA         - Define Extent data area
      DXLPL        - DIAGNOSE X'278' (XLINK) Parameter List
      DX1BK        - Minidisk extent index level 1.
      DX2BK        - Minidisk extent index level 2.
      D29000       - Diagnose x'290' parameter block
      D29004       - Diagnose x'290' parameter block
      D88PARM0     - Diagnose 88 parameter list
       ETop of page  EASIT        - External-Address-Space-Identification
      ECBBK        - Event Control Block
      EDEV         - EMULATION DEVICE BLOCK
      EDEVBX       - EMULATION DEVICE BLOCK
      EDEVPATH     - EMULATION DEVICE BLOCK
      EDEVSIM      - EMULATION DEVICE BLOCK
      EMSBK        - EMERGENCY SIGNAL SIGP TASK BLOCK
      ENCBK        - Encryption Data Block
      EQIBK        - Equivalency Identification Block
      EREXTCST     - CHANNEL PROGRAM DSECT BLOCK
      EREXTEST     - CHANNEL PROGRAM DSECT BLOCK
      EREXTFST     - CHANNEL PROGRAM DSECT BLOCK
      EREXT2ST     - CHANNEL PROGRAM DSECT BLOCK
      ERSADDR      - ERROR RECOVERY SPECIFICATION
      ERSTBL       - ERROR RECOVERY SPECIFICATION
      ESDBK        - External Symbol Dictionary Block
      ETHBK        - IEEE Ethernet Frame
      EVCBK        - Environment Variable Collection Control Block
      EVCENT       - Environment Variable Collection Control Block
      EVNBK        - C System Services Event block
      EVRBK        - Environment Variables Control Block
      EVTBK        - ANCHOR FOR PROCESSOR LOCAL WORKAREAS
      EXCBK        - DIAGNOSE X'280' exec() block
      EXCVROBJ     - DIAGNOSE X'280' exec() block
      EXDBK        - exec() data block
      EXPBK        - Paging Information Header Block
      EXPQUENT     - Paging Information Header Block
      EXQBK        - exec() request block user data mapping
      EXRBK        - exec() remote data map block
      EXTBK        - Extent Block
       FTop of page  FASBK        - VMDUMP File Address Space Information
      FCABK        - FCP device activity block
      FCLBK        - FCP List Directed IPL Block Mapping
      FCLVPARM     - Variable Parameter Information Block
      FCPBK        - EXPLORE FCP Device Block
      FCSPL        - FCP List Directed IPL Parameter List
      FCTBK        - Fast CCW Translation BlocK
      FILID        - File identification table
      FINBK        - FLOATING EXTERNAL INTERRUPT CONTROL BLOCK
      FIOBK        - FORMATTED I/O BLOCK
      FLSPT        - Spool-to-Tape list of files to dump
      FMASK        - File Mask Equates
      FMLRC        - VOLUME LABEL RECORD
      FORBK        - The FOR control block.
      FORCTBL      - The FOR control block.
      FORMS        - System spool output forms and user forms
      FPRBK        - Floating-Point Register Block
      FPXSA        - Floating Point Extended Save Area
      FREBK        - FREE STORAGE BLOCK
      FRHBK        - Function-Related trace table vector header
      FRMHDR       - IEEE Ethernet Frame
      FRMTE        - FRAME TABLE ENTRY
      FRQBK        - Frame Request Block
      FRTBK        - Function-Related Trace table vector entry
      FRUBK        -
      FRUREC       -
      FRXAN        - Storage pool statistics
      FSATE        - FIXED STORAGE ASSIGNMENT TABLE ENTRY
      FSBK         - CP File Status Block
      FSCBK        - Free Storage Counter Block
      FSDBK        - Free Storage Data Block
      FSHBK        - CP File Status Head
      FTPBK        - FOOT-PRINT BLOCK
      FTXBK        - Frame Table Extent Block
      FXPBK        - Hyperpav paging channel program storage
      FXTBK        - FcX channel program Translation BlocK
      F2IDAL       - Format-2 IDAW Mapping
       GTop of page  GALPL        - Generalized Associative Lookup
      GCCW         - GUEST CHANNEL CONTROL WORD MAPPING
      GPGARY       - Global Port Group Manager Block
      GPGBK        - Global Port Group Manager Block
      GPGENT       - Global Port Group Manager Block
      GRBK         - Guest response block
      GSBBK        - Guest Storage Relocation Buffer Block
      GSBRBAE      - Guest Storage Relocation Buffer Block
      GSDBK        - GENERAL SYSTEM DATA BLOCK
      GSXBK        - Cross system communication block
      GVSBK        - Global VSwitch Manager Block
      GVSENBK      - Global VSwitch Manager Block
      GVSMBK       - Global VSwitch Manager Block
       HTop of page  HisMTDsc     - HISMT Service Interval Area *02* ACRONYM: N/A
      HisMTEnt     - HISMT Service Interval Area *02* ACRONYM: N/A
      HisMTHdr     - HISMT Service Interval Area *02* ACRONYM: N/A
      HALBK        - Host-ART lookaside block
      HATBK        - Soft abend Correlation Table entry
      HCCW         - HOST CHANNEL CONTROL WORD
      HCIBK        - Hardware Console Integration Message Buffer
      HDPBK        - Host DAT table Programming area block
      HDRREC       - COMMON HEADER FOR ERROR RECORDS
      HFOBK        - Monitor I/O Domain Hi-Frequency Sample Data Area
      HFPBK        - Monitor Processor Domain Hi-Freq Sample Data Area
      HFUBK        - Monitor User Domain Hi-Frequency Sample Data Area
      HFYBK        - Monitor System Domain Hi-Frequency Sample Data
      HLPBK        - High Low Prediction Control Block
      HLQBK        - Harware Loader Queue Block
      HPPBK        - HYPERPAV ALIAS POOL BLOCK
      HPVBK        - HYPERPAV ALIAS POOL BLOCK
      HRLBK        - Human Readable Label Table Block
      HSABK        - Hardware System Storage Control Block
      HSHAV        - Minidisk Cache Collision Node Available
      HXPBK        - Hyperpav paging IO block
       ITop of page  IASIT        - Internal-Address-Space-Identification
      ICLBK        - Indirect Call Locator Block
      ICMPHDR      - IP (Internet Protocol) Header
      ICRBK        - Indirect Call Request Block
      IDAL         - INDIRECT DATA ADDRESS LIST MAPPING
      IDHBK        - Spool Image Library Directory Header
      IDMBK        - Spool Image Library Directory Member
      IDSBK        - ISFC ID segment table
      IDSEGENT     - ISFC ID segment table
      IDSLTENT     - ISFC ID segment table
      IDTPL        - *IDENT internal routine parameter list
      ILMBK        - IP LAN Management block
      IMGBK        - Image library/NLS Message Repository
      IMHBK        - Spool Image Library Member Header Block
      INFBK        - Mappings for STHYI
      INFCHDR      - Mappings for STHYI
      INF0GST      - Mappings for STHYI
      INF0HDR      - Mappings for STHYI
      INF0HDYG     - Mappings for STHYI
      INF0HYP      - Mappings for STHYI
      INF0MAC      - Mappings for STHYI
      INF0PAR      - Mappings for STHYI
      INF1BK       - Mappings for STHYI
      INF1GST      - Mappings for STHYI
      INF1HYP      - Mappings for STHYI
      INF1MAC      - Mappings for STHYI
      INF1PAR      - Mappings for STHYI
      INF1YGHD     - Mappings for STHYI
      INF2BK       - Mappings for STHYI
      INF2GST      - Mappings for STHYI
      INF3BK       - Mappings for STHYI
      INF3GST      - Mappings for STHYI
      INF4BK       - Mappings for STHYI
      INF4POOL     - Mappings for STHYI
      INF5BK       - Mappings for STHYI
      INF6BK       - Mappings for STHYI
      INF6MEM      - Mappings for STHYI
      IOCM         - I/O Completion Block
      IOIP         - INPUT/OUTPUT INTERRUPTION CODE MAPPING
      IOPBK        - I/O Passthrough Block
      IORBK        - I/O Request and Response Block
      IOWBK        - DATATRACE TYPE IO WORKAREA
      IPARM        - IPL parameters
      IPARML       - IUCV/APPC parameter list and external
      IPARMLX      - APPC CONNECT PLIST EXTENSION MAPPING
      IPAX         - IPL parameters
      IPLBK        - IPL Command Work Buffer
      IPLREC       - System Initialization (IPL) record
      IPMBK        - IP Multiple Entry structure
      IPMLM_ENTIP  - Multiple Entry structure
      IPMQC_ENTIP  - Multiple Entry structure
      IPNBK        - IP Node block
      IPQBK        - I/O Priority Queueing Parameter Block
      IPQXBK       - I/O-Priority Event Information Pending Queue
      IPSEV6HD     - IP (Internet Protocol) Header
      IPTRGMAP     - Map IPTRGCLS from IPARML COPY
      IP4HDR       - IP (Internet Protocol) Header
      IP6HDR       - IP (Internet Protocol) Header
      IRBLK        - INTERRUPTION RESPONSE BLOCK MAPPING
      IRCBK        - *IDENT Resource Communication block
      IRCVRGID     - *IDENT Resource Communication block
      IRCVROBJ     - *IDENT Resource Communication block
      IRMBK        - INTENSIVE RECORDING MODE BLOCK
      ISFDEVTB     - Definition tables for Cross System
      ISFEXTAB     - Definition tables for Cross System
      ISFNAMTB     - Definition tables for Cross System
      ISFSYSTB     - Definition tables for Cross System
      ISFVOLTB     - Definition tables for Cross System
      ISFXLSTB     - Definition tables for Cross System
      ITRBK        - Host DAT Table Iterator Control Block
      IUCVB        - IUCV CONTROL BLOCK
      IUSBK        - IUCV WORK AREA MAPPING MACRO
      IUUBK        - IUCV USERID AUTHORIZATION BLOCK
      IVLBK        - IVL Domain Member Table
      IVLMBK       - IVL Domain Member Table
      IVLS_EVENIVL - Domain Member Table
      IXBLK        - IUCV DEFERRED EXECUTION BLOCK
       JTop of page  None
       KTop of page  KBRBK        - DSECT and EQUATES for z/VM ISFC Synchronization
      KCLBK        - ISFC Link Layer message frame
      KCMBK        - Kernel communication management block
      KEYOBJ       - KEY OBJECT
      KLABK        - Key Label block
       LTop of page  LABK         - Map the Load Anchor Block
      LANBK        - Virtual LAN Block
      LANRDD       - Virtual LAN Block
      LANVID       - Virtual LAN Block
      LATBK        - C System Services Latch block
      LBPBK        - LOADBUF Parameter Block
      LBXBK        - Language Block Extension
      LCDA         - Locate data area
      LCKBK        - LOCK BLOCK
      LCKLF        - CFLF LOCK TABLE (LCK)
      LCPBK        - Limiting CPU Pool system block
      LCPDU        - LinkAG LACP Protocol-Data-Unit (PDU) c/b
      LCRBK        - Locate Record Parameter
      LDCBK        - ISFC Line Driver Constants
      LDDBK        - LOGICAL DISPLAY DEVICE SIMULATION BLOCK
      LDFPL        - Load file via FTP parameter list
      LDVBK        - ISFC Link Device Extension
      LEDA         - Locate Record Extended data area
      LGFBK        - LOGOFF control block
      LGNBK        - LOGON work buffer
      LGPBK        - HCPUSODC and HCPUSORF Parameter List
      LIMBK        - Limiting block for a CPU Pool
      LKBK         - Minidisk LINK Block
      LKIWD        - Defer-lock (I/O) "Lockword"
      LKSBK        - Linkage Stack block
      LKWRD        - Defer-lock "lockword"
      LLNBK        - Link Layer (MAC) Node
      LLXBK        - Link Layer Index Table entry
      LLXITEM      - Link Layer Index Table entry
      LMMWK        - "LOCATE in memory" command work area
      LNGBK        - Language Information Block
      LNKBK        - ISFC Link Definition Block
      LOCBK        - C System Services Lock block
      LOCDSECT     -
      LOGMS        - LOGON MESSAGE BLOCK
      LQWBK        - LOCATE CMDBK and QUERY CPCMDS Work area
      LRARG        - Locate Record CCW argument mapping
      LRBK         - Map the Load Request Block
      LRDA         - Locate Record (Extended) data area
      LRDXILRE     - Locate Record (Extended) data area
      LSBLOCK      - Library Statistics Block
      LSOBJ        - LOGICAL SUBCHANNEL OBJECT
      LSRBK        - LOCAL SYSTEM REQUEST BLOCK
      LUNBK        - LU Name COntrol Block
      LWKBK        - ISFC Link Work management structure
      LWKCCWPG     - ISFC Link Work management structure
       MTop of page  MBBK         - Managed Buffers Set Block
      MBEBK        - ISFC Mailbox entry block
      MBHBF        - ISFC Message Buffer Header Block
      MBHBK        - ISFC Message Buffer Header Block
      MBRBK        - ISFC MESSAGE REQUEST BLOCK
      MCEBK        - Machine-Check Extended Save Area
      MCFBK        - Trace Service Tool Monitor Call Trace
      MCHREC       - MACHINE CHECK ERROR RECORD
      MCKBK        - MACHINE CHECK DESCRIPTOR BLOCK
      MCPBK        - Monitor CPVOL Paging/Spooling Block
      MCRBK        - Machine Check Record Block
      MCVBK        - VIRTUAL MACHINE CHECK BLOCK
      MDAS         - Map MDC addr spaces represented in the TCMBK
      MDCBK        - Storage area for SET MDC/Q MDC cmnds
      MDEADENT     - ISFC Message Descriptor Block
      MDEBFENT     - ISFC Message Descriptor Block
      MDEBK        - ISFC Message Descriptor Block
      MDGBK        - MONDIAG control block
      MDISK        - Mini-disk Control Block
      MDRREC       - MISCELLANEOUS DATA RECORD
      MESIX        - Message Repository Contents
      MESMS        - Message Repository Contents
      MESPN        - Message Repository Contents
      MESP1        - Message Repository Contents
      MIDAW        - Modified indirect data addressing word mapping
      MIHBK        - MISSING INTERRUPT HANDLER INFO BLOCK
      MIHDR        - MISSING INTERRUPT HANDLER HEADER BLOCK
      MIOBJ        - MISSING INTERRUPT OBJECT
      MIRREC       - 370 MODE MISSING INTERRUPT RECORD
      MITREC       - 370/XA MODE MISSING INTERRUPT RECORD
      MKPDU        - LinkAG Marker Protocol-Data-Unit (PDU)
      MLDBK        - Mapping List Definition Block.
      MLDENTRY     - Mapping List Definition Block.
      MLEBK        - Member List Entry Block
      MLTBK        - Multi-Level Table definition
      MMLBK        - Monitor Message List
      MONEQ        - Monitor Equate Symbols
      MONSK        - Monitor SEEKs Mapping
      MPEBK        - Minidisk pool extent block.
      MPIBK        - Memory Pass Information Block
      MPLBK        - Map Parameter List BlocK.
      MRQBK        - Diagnose 98 Multiple Request Block
      MRQFCNLK     - Diagnose 98 Multiple Request Block
      MSABK        - Map of Slot Allocation
      MSDBK        - Monitor Send Block
      MSGBK        - MESSAGE BLOCK MAPPING MACRO
      MSMPR        - HCPMSM ParameteR passing block.
      MSTBK        - MESSAGE TEXT DATA BLOCK
      MSVBK        - Mappings for MAC Services Control Block
      MTD04        - MT Counter set counter descriptions
      MTEBK        - MONITOR TRANSACTION-END DATA BLOCK
      MTPBK        - MEMBER TOPOLOGY PACKET
      MTRTABL      - MEMBER TOPOLOGY PACKET
      MUC_COM_TMon - User Control Block
      MUCBK        - Monitor User Control Block
      MWBK         - Multiple address space (MAS) Work area
      MWTBK        - Monitor Writer Control Record Block
      MXRBK        - MESSAGE NUMBER CROSS-REFERENCE BLOCK
       NTop of page  NAMBK        - TRSOURCE NAME TABLE
      NCABK        - Network Card Accounting Block.
      NDCBK        - Virtual Network Interface Card block
      NDMBK        - Network Device Message Block
      NEDBK        - Node Element Descriptor Block
      NEQBK        - Node Element Qualifier Block
      NETBK        - *NETWORK Request Block
      NE0BK        - *NETWORK Request Block
      NE1BK        - *NETWORK Request Block
      NE2BK        - *NETWORK Request Block
      NE2MSA       - *NETWORK Request Block
      NE3BK        - *NETWORK Request Block
      NICBK        - Virtual Network Interface Card block
      NIDBK        - Network Interface Device Block.
      NIDVID       - Network Interface Device Block.
      NODBK        - ISFC Node description block
      NSABK        - NSS/DCSS AUTHORIZATION BLOCK
      NSCPR        - HCPNSCPR parameter list mapping
      NSDBK        - DEFSEG/DEFSYS parameter control block
      NSGBK        - GENERAL INTERFACE CONTROL BLOCK TO HCPNSG
      NSSBK        - SAVESEG/SAVESYS parameter control block
      NSUBK        - Auxillary Storage Management utility data
      NTLBK        - Network Lock Block.
       OTop of page  OBJSTMT      - Various object deck record formats.
      OBRREC       - OUTBOARD RECORDING RECORD
      OFBK         - CP Open File Block
      OLTBLE       - Address Space Information Block
      OPCTB        - OPERATOR CONSOLE DEVICE NUMBER TABLE
      OPNBK        - ISFC CP Application open control block
      ORBLK        - OPERATION REQUEST BLOCK MAPPING
      OSIBK        - OS Info
       PTop of page  PAGBK        - Page I/O DSECT Block
      PAGG         - Page Table Entry for z/Architecture
      PAG39        - ESA/390 Page Table Entry
      PAG64        - Page Table Entry
      PCBUF        - putchar() Buffer
      PCCBK        - PROCESSOR CONTROLLER SERVICE CALL DATA BLOCK
      PCCCPDES     - Read Channel-subsystem Information
      PCCMSAL      - Read Channel-subsystem Information
      PCCVSCPD     - Read Channel-subsystem Information
      PCDBK        - PROCESSOR CONTROLLER DIAGNOSE DATA BLOCK
      PCIHQ        - PCI Information block
      PCRBK        - PROCESSOR CONTROLLER REQUEST BLOCK
      PCSBK        - PROCESSOR CONTROLLER STATUS BLOCK
      PDEBK        - PATH DESCRIPTOR ENTRY
      PDMBK        - PDR Management Block
      PDRADESC     - Persistent Data Record
      PDRBK        - Persistent Data Record
      PDRREPLA     - Persistent Data Record
      PDRSYSTM     - Persistent Data Record
      PDSBK        - Partitioned Data Set Block
      PEDBK        - Product Enablement Data Block
      PFCRHDR      - Persistent FlashCopy Relationship Table
      PFCRTABL     - Persistent FlashCopy Relationship Table
      PFKPL        - Program Function Key Parameter List
      PFMBK        - PAGEABLE FREE MANAGMENT BLOCK
      PFPRQ        - Prefetch PPGMBK Request block
      PFUNC        - CP Program Function Key anchor
      PFXPG        - PREFIX PAGE FOR ALL HOST CPU'S
      PF2PG        - PREFIX PAGE FOR ALL HOST CPU'S
      PGAUX        - Page Auxiliary Status Table Entry
      PGEBK        - Page Allocation Management Block
      PGLBK        - Page List Block
      PGM64        - Page Management Block
      PGS64        - PAGE STATUS TABLE ENTRY
      PHDBK        - Paging Information Header Block
      PIOBK        - Paging I/O CCW packages.
      PIRBK        - Page Interrupt Return control BlocK.
      PLMBK        - Plex Manager Block
      PLSBK        - PROCESSOR LOCAL STORAGE BLOCK
      PMSBK        - Plex Member System Table Entry Block
      PODBK        - Relocation Pages on DASD Block
      PPABK        - Point to Point Accounting Block.
      PPDBK        - Paged PGMBK Data block
      PPFBK        - PSEUDO PAGE FAULT STACK BLOCK
      PPLBK        - Product Parameter List Block
      PPRLG        - Pending Page Release Log
      PRKBK        - PARK/UNPARK RELATED DATA AREAS
      PRLOG        - layout for prolog at beginning of module
      PRMBK        - HCPJRLIT call parameter list
      PROBK        - PROTECT BLOCK
      PSF          - CHANNEL PROGRAM DSECT BLOCK
      PSFBK        - PURGE SPOOL FILE CONTROL BLOCK
      PSGBK        - POSIX supplementary GIDs Block
      PSIBK        - Previous System Image block
      PSQBK        - LGR PTE Serialization Queue Block
      PSST         - PTE Serialization Status Tracking block
      PSTBK        - SSI Service Table Entry Block
      PTABK        - PTE array block
      PTESET       - Map an area in the TCMBK for a given PTE set size
      PTHBK        - ISFC Path description block
      PTRMB        - Page Table Resource Management block
      PTTBK        - Page Translation (HCPPTZMT) parameters
      PURBK        - Minidisk Cache Purge block
      PWDBK        - Block to store journaling information
      PWIBK        - PGMBK Walker Interface Block
      PXBBK        - SSI Manager Bitmap Exchange Message
      PXBMAP       - SSI Manager Bitmap Exchange Message
      PXIBK        - POSIX IDs Block
      PXMSYNCH     - SSI Manager Synchronization Message
      PXSBK        - SSI Member System Services Data Block
       QTop of page  QALBK        - Query Alloc Block
      QCIBK        - Query Counter Information Block
      QDGBL        - V-Disk Global Control Block
      QDIO         - Queued Direct I/O Control Block
      QDISK        - Q-Disk Control Block
      QHDBK        - Query Spool Files Response Headers and
      QPXBK        - Interface for POSIX ID query requests
      QRBLK        - Queue Request Block
      QSBLK        - (QSBLK) QDIO Statistics Block
      QSFBK        - QUERY SPOOL FILES DESCRIPTOR BLOCK
      QSIBK        - Query Sampling Information Block
      QUEBK        - Queue Control Block
      QVS          - Sysevent QVS parameter list */ * */ *02* Acronym:
       RTop of page  RALMTCST     - CHANNEL PROGRAM DSECT BLOCK
      RALMTEST     - CHANNEL PROGRAM DSECT BLOCK
      RALOCCST     - CHANNEL PROGRAM DSECT BLOCK
      RALOCEST     - CHANNEL PROGRAM DSECT BLOCK
      RALOCFST     - CHANNEL PROGRAM DSECT BLOCK
      RCCBK        - RCPU DATA AREA MAPPING
      RCCHMTDS     - RCPU DATA AREA MAPPING
      RCCTOPDC     - RCPU DATA AREA MAPPING
      RCCYMTDS     - RCPU DATA AREA MAPPING
      RCDBK        - READ CONFIGURATION DATA BLOCK
      RCPTE        - REFERENCE AND CHANGE PRESERVATION TABLE ENTRY
      RCWBK        - CURRENT REAL CHANNEL CONTROL WORDS
      RDCBK        - Real Device Characteristics Block
      RDEV         - REAL DEVICE CONTROL BLOCK
      RDLBCST      - CHANNEL PROGRAM DSECT BLOCK
      RDLBEST      - CHANNEL PROGRAM DSECT BLOCK
      RDLBFST      - CHANNEL PROGRAM DSECT BLOCK
      RDMBK        - RELOCATION DOMAIN BLOCK
      RDOBK        - Relocation Data Object
      RDPBK        - Relocation Data Package Block
      RECBK        - RECORDING RECORD FORMAT BLOCK
      RECHEAD      - Mapping of HCPDLJ and HCPDLK Common Area
      REFBK        - Page References Services Parameter Block
      REFENTRY     - Page References Services Parameter Block
      REGBK        - User Exit Registration Block
      REQBK        - Request block
      RLDBK        - Relocation Dictionary Block
      RLHDR        - Live Guest Relocation Control Socket Message
      RLMAS        - LGR Memory Move Message DSECTs
      RLMBP        - LGR Memory Move Message DSECTs
      RLMDE        - LGR Memory Move Message DSECTs
      RLMLG        - LGR Memory Move Message DSECTs
      RLMSG        - LGR Memory Move Message DSECTs
      RLOBK        - Live Guest Relocation control block
      RLOS         - Live Guest Relocation control block
      RPABK        - Parameter list for HCPRPA
      RPCI         - Real PCI Function Block
      RQHDR        - SAVBK Return Queue Header Block
      RQPARM       -
      RRTBLE       - Address Space Information Block
      RSADefFRQRSM - common area mapping
      RSAIOATD     - RSM common area mapping
      RSAQHDR      - RSM common area mapping
      RSDBK        - Set Reserved Data Block
      RSEBK        - Reset Event Block
      RSHBK        - RSPBK Header Block
      RSMANCHR     - RSM common area mapping
      RSMBK        - EQUATE SYMBOLS
      RSPBK        - REAL SPOOL DEVICE BLOCK
      RSSBK        - RECORDING SYSTEM SERVICE BLOCK
      RTEBK        - Region-Table Entry
      RTHBK        - RECORDING TABLE HEADER BLOCK
      RTVBK        - CP Program Function Key Retrieve Block
      RWAESM       - ESM SSI Support Information Mapping
      RXSPEC       - Virtual Network Interface Card block
       STop of page  SABCM        - SOFT ABEND COMMON AREA
      SALBK        - Slot Allocation Data Block
      SAMBK        - SNAPPED AREA'S MAP BLOCK
      SASBK        - Saved Segments Data Array
      SASEDATA     - Saved Segments Data Array
      SATBK        - Soft abend Correlation Table entry
      SAVBK        - CALL WITH SAVEAREA BLOCK
      SBILIST      - Synchronous Block I/O Parameter
      SBIOP        - Synchronous Block I/O Parameter
      SCABK        - System Control Area for Interpretive
      SCCLK        -
      SCFBK        - System Config File Parsing plist
      SCGBK        - 64 byte Subchannel Measurement Block
      SCHIB        - SUBCHANNEL INFORMATION BLOCK MAPPING
      SCKARY       - Socket control block
      SCKBK        - Socket control block
      SCLBK        - *SCLP IUCV System Service Block
      SCLCHTEN     - *SCLP IUCV System Service Block
      SCMBK        - SUBCHANNEL MEASUREMENT BLOCK
      SCQBK        - Native SCSI Container QDIO Control
      SCTBK        - SPOOL FILE CLASS TITLE BLOCK
      SCTLF        - CFLF SUBSYSTEM CONNECT TABLE ENTRY
      SCUBK        - Security symbol table control block
      SDBBK        - ISFC Send Data Buffer block
      SDBLSENT     - ISFC Send Data Buffer block
      SDDATA       - TCMBK steal info for Main stg or XSTORE
      SDDBK        - SET DUMP DATA
      SDFBK        - SYSTEM DATA FILE BLOCK
      SDLBK        - SPOOLING DATA LOCATOR BLOCK
      SDMBK        - SNAP DATA MAP BLOCK
      SDMCM        - Common Data Area for Storage Device Management
      SDNX         - State Description Annex
      SDPG         - SNAP DATA PARAMETER LIST
      SDPL         - SNAP DATA PARAMETER LIST
      SDRREC       - STATISTICAL DATA RECORDING BLOCK
      SDSBK        - Stand-alone dump status record
      SDSLINE      - Stand-alone dump status record
      SDWBK        - Stand-alone dump writer partition record
      SDXBK        - Stand-alone dump index record
      SECBK        - An element of the SECONDARY USERIDS TABLE
      SEGG         - z/Architecture Segment Table Entry
      SEGG         - z/Architecture Segment Table Entry
      SEG37        - Segment Table Entry for 370
      SEG39        - ESA/390 - Segment Table Entry
      SEG64        - SEGMENT TABLE ENTRY
      SEPPAG1      - Printer separator page definition
      SEPPAG2      - Printer separator page definition
      SEPTRL       - Printer separator page definition
      SESBK        - MPC User Session Block
      SFBLOK       - VM/SP 370 SPOOL FILE CONTROL BLOCK
      SFNDX        - CHECKPOINT SPOOL FILE POINTERS
      SFXBK        - SOFTWARE EXTERNAL INTERRUPT CONTROL BLOCK
      SGIOP        - Synchronous General I/O Parameters
      SGPBK        - Segment Space/Saved System Parameter
      SGTBK        - SAVED GUEST TIMERS BLOCK
      SHABK        - Secure Hash Algorithm parameter block
      SHOBK        - Set System Characteristics Data Area
      SHPBK        - Map/Generate CSE Sys Definition Table
      SHPQITEM     - VM Cross-System Requests
      SHQBK        - SPOOL HOLD QUEUE
      SHRBK        - SHARE BLOCK
      SHUBK        - SHUtdown Control Block
      SIABK        - Spool Id Allocation Map
      SIDBK        - SYSTEM ID LIST
      SIEBK        - SIE STATE DESCRIPTOR BLOCK
      SILBK        - Spool 3800 Image Load Block
      SI1BK        - SIE STATE DESCRIPTION (format 1)
      SI2BK        - SIE STATE DESCRIPTOR BLOCK (format 2)
      SLDBK        - map-Save-List Definition BlocK.
      SLDINPAG     - map-Save-List Definition BlocK.
      SLDPAGER     - map-Save-List Definition BlocK.
      SLHREC       - SUBCHANNEL LOGOUT ERROR RECORD
      SLMBK        - System LAN Management block
      SLPBK        - Service-call Logical Processor control block
      SLTBK        - Save-List Task BlocK.
      SL1BK        - Multi-Level Table definition
      SMPBK        - CPU-Measurement Sampler Facility Data
      SMTBK        - SMT RELATED DATA AREAS
      SNABK        - SNA Resource Block
      SNDBK        - *BLOCKIO's IUCV SEND Request Block
      SNSBK        - SENSE DATA BLOCK
      SNSID        - CHANNEL PROGRAM DSECT BLOCK
      SNSID        - SENSE ID Data Mapping
      SNTBK        - System Name Table Block
      SOCACPL      - ISFC Socket function parameter list
      SOCBIPL      - ISFC Socket function parameter list
      SOCCCPL      - ISFC Socket function parameter list
      SOCCLPL      - ISFC Socket function parameter list
      SOCCNPL      - ISFC Socket function parameter list
      SOCCPPL      - ISFC Socket function parameter list
      SOCCRPL      - ISFC Socket function parameter list
      SOCCSPL      - ISFC Socket function parameter list
      SOCFXPL      - ISFC Socket function parameter list
      SOCGTPL      - ISFC Socket function parameter list
      SOCLCPL      - ISFC Socket function parameter list
      SOCPL        - ISFC Socket function parameter list
      SOCRMPL      - ISFC Socket function parameter list
      SOCRPPL      - ISFC Socket function parameter list
      SOCRQPL      - ISFC Socket function parameter list
      SOCRXPL      - ISFC Socket function parameter list
      SOCSNPL      - ISFC Socket function parameter list
      SOCSQPL      - ISFC Socket function parameter list
      SOCSTPL      - ISFC Socket function parameter list
      SOCTXPL      - ISFC Socket function parameter list
      SORPL        - Quicksort Parameter List
      SORWA        - Quicksort Parameter List
      SOTBK        - SPOOL OPTIONS TABLE ENTRY BLOCK
      SPABK        - SPOOL FILE ALLOCATION BLOCK
      SPDBK        - SPOOL FILE DATA PAGE BLOCK
      SPFBK        - SPOOL FILE DESCRIPTOR (OR CONTROL) BLOCK
      SPGBK        - Spool File Get Block
      SPIBK        - Space Permission Information BlocK
      SPLINK       - VM/SP 370 SPOOL FILE DATA BLOCK
      SPMBK        - SPOOL FILE MAP PAGE BLOCK
      SPRBK        - Spool File Reply Block
      SPTBK        - SPTAPE and SPXTAPE 'Spool to Tape'
      SPXBK        - Interface for POSIX ID set requests
      SRBBK        - Symptom Record Building Parameter List
      SRMBK        - SYSTEM RESOURCE MANAGEMENT BLOCK
      SRQBK        - IVL Outstanding Message Block
      SRTBK        - SYSTEM RESOURCE TABLE ENTRY BLOCK
      SRXBK        - System Resource Management block extensions
      SR3BK        - Symptom Record Primary Symptom Strings
      SR3REGS      - Symptom Record Primary Symptom Strings
      SR3RETC      - Symptom Record Primary Symptom Strings
      SR3RIDSS     - Symptom Record Primary Symptom Strings
      SR5BK        - Symptom Record Section Five
      SSBDF        - Syntax subdefinition description area
      SSCBK        - SYSTEM SERVICE CONTROL BLOCK
      SSDBK        - SYSTEM SMOOTHED DATA BLOCK
      SSHBK        - User Share Settings control block
      SSHVBK       - User Share Settings control block
      SSIBK        - System Information Block Dsect
      SSMBK        - SNAP SAVEAREAS MAP BLOCK
      SSPBK        - Pointer block to SSBDF blocks
      SSQBK        - SPXTAPE Section Quorum Block
      STADF        - Syntax state definition area
      STCONFIG     - Address-Space-Control Block
      STD          - Architected version of the ESA/390
      STDBK        - SYSTEM TERMINATION DATA BLOCK
      STDG         - Architected version of the z/Arch
      STFLE        - STFLE response mapping
      STHLF        - SUBSYSTEM TABLE HEADER BLOCK
      STLBK        - SEGMENT TABLE ENTRY LIST BLOCK
      STLTE        - Segment Table List Block Table Entry
      STPBK        - SHARED-TAPE CONTROL BLOCK
      SUBBK        - Subpool Data Area Block
      SVGBK        - Linkage savearea, longreg format
      SVHBK        - Common linkage savearea header
      SVMREC       - SPECIAL VM RECORD
      SWIBK        - DSECTS and EQUATES for z/VM Virtual Switch
      SWP_MACTKVSW - Port Group Block
      SWPBK        - VSWITCH Port Group Block
      SWPI         - VSWITCH Port Group Block
      SXEWK        - Storage Extension Work Area
      SXIDABK      - DIAGNOSE X'64' SEGMENT EXTENDED INPUT AREA
      SXLBK        - Distributed shared-exclusive spinlock.
      SXLEN        - Distributed shared-exclusive spinlock.
      SXLEX        - Distributed shared-exclusive spinlock.
      SXLSW        - Distributed shared-exclusive spinlock.
      SXLXL        - Distributed shared-exclusive spinlock.
      SXODABK      - DIAGNOSE X'64' SEGMENT EXTENDED OUTPUT AREA
      SXSTE        - SXS Page Management Table Entry
      SYMLH        - Symbol LOCATE Header Block
      SYMPT        - Symbol LOCATE Pointer Block
      SYMTB        - Symbol Table Entry
      SYNBK        - Formal exclusive-only spinlock block
      SYNCBUFF     - Synchronization Buffer
      SYNDF        - Syntax definition description area
      SYSCM        - SYSTEM COMMON AREA
      SZQBK        - IOSC_queryDevice Information Block
      SZQDEVIN     - IOSC_queryDevice Information Block
      SZQPTHIN     - IOSC_queryDevice Information Block
      SZQSTATE     - IOSC_queryDevice Information Block
      SZQSTATS     - IOSC_queryDevice Information Block
      SZREQ        - SCSI Strategy Call Request Block
      SZVHB        - Save area header and linkage used for CP C
      SZVIN        - SCSI Container SIC global block
      SZVMA        - Save area header and linkage used for CP C
      SZVSB        - Save area header and linkage used for CP C
      SZWRS        - SCSI Container Write same control block
      S0CCW        - SPOOLing Format 0 Channel Control
      S1CCW        - SPOOLing Format 1 Channel Control
       TTop of page  ThresholdRSM - common area mapping
      TAPBK        - SPXTAPE Tape Drive Control Block
      TBFBK        - Trace service tool Buffer Format Block
      TBTBK        - Traceback table
      TCAT         - FCX Transport Command Control Block
      TCCBK        - FCX Transport Command Control Block
      TCHBK        - Track Cache Hash block
      TCHSTDFM     - Track Cache Hash block
      TCMBK        - Full Track Cache Main Control Block
      TCWBK        - FCX Transport Control Word
      TDBK         - Transaction Diagnostic Block
      TDHBK        - TRACE SERVICE TOOL DIAGNOSE READ HEADER BLOCK
      TDRBK        - TRACE SERVICE TOOL DIAGNOSE READ
      THRBK        - Throttle Control Block
      TIC_STK_LMAP - OF FORWARD TIC STACK
      TICENT       - TIC Entry
      TICST        - MAPPING OF FORWARD TIC STACK
      TIDAW        - Transport indirect data addressing word mapping
      TKTBK        - SPXTAPE File Control Information Block
      TOKDF        - Syntax token definition area
      TOPBK        - CPU Topology Block
      TPCBK        - TAPE PATHING CONTROL BLOCK
      TPEBK        - TAPE CONTROL BLOCK
      TPLBK        - TAPE LABEL CONTROL BLOCK
      TRCBK        - Traceid block
      TRDBK        - TRACEID/TRACESET DISPLAY CHAIN ENTRY
      TRGBK        - ISFC CP Application target control block
      TRPBK        - TRACE TRAP BLOCK
      TRQBK        - TIMER REQUEST BLOCK
      TRSBK        - TRACE SET BLOCK
      TRWBK        - TRACE Work Block
      TRXBK        - TRACE EXTENSION BLOCK
      TSABK        - TRSAVE definition block
      TSBBK        - FCX Transport Status Block
      TSDBK        - TRACE SERVICE DASD BLOCK
      TSKBK        - Task Control Block
      TSTBK        - Trace Service Tool Block
      TTABK        - Table of Trace Entry Codes
      TTEBK        - TRACE TABLE ENTRY FORMAT
      TTPBK        - TRACE TABLE PAGE FORMAT
      TTSBK        - TRACE TABLE SAVE ENTRY FORMAT
      TTYFLG       - HCPTYI AND HCPTYO PARAMETERS
      TXCCM        - TRSOURCE COMMON DATA AREA
      TXLPL        - PARAMETER LIST FOR TRCBK CHAIN SERVICES
      TZABK        - Time Zone Anchor Block
      TZDBK        - Time Zone Definition Block
      TZIBK        - Time Zone Interval Block
      T64LB        - TLB64 Entry (64 bit addresses)
       UTop of page  UALBK        - User Alias Block
      UDCTL        - HCPUDU Data Block
      UFOHDR       - VIRTUAL MACHINE DEFINITION BLOCK
      UFORM        - System spool output forms and user forms
      UIDBK        - Monitor Userid Control Block
      UNLODBUF     - CHANNEL PROGRAM DSECT BLOCK
      UOPAG        - Page one of z/Arch Prefix Page
      USRBCBK      - SSI complex wide user attributes
      USRBK        - SSI complex wide user attributes
      USVOL        - User volume descriptor
      USXBK        - User Security Extension Block
      UTRENT       - Untranslation Entry
      UTXENT       - FCX Untranslation Entry
      UWKPG        - INDICATE USER data block
      UZPAG        - PREFIX STORAGE AREA - MACHINE USAGE
       VTop of page  VAABK        - ARCHITECTURE ANCHOR BLOCK
      VDEV         - VIRTUAL DEVICE CONTROL BLOCK
      VDIBK        - VDISK data BlocK (Guest Relocation)
      VDIDATA      - VDISK data BlocK (Guest Relocation)
      VDIVLT       - VDISK data BlocK (Guest Relocation)
      VDSBK        - VIRTUAL DEVICE SIMULATION BLOCK
      VDUBK        - Virtual Machine Dump Block
      VDUXTBL      - Virtual Machine Dump Block
      VECBK        - Vector Register Block
      VEXBK        - Volume EXtent block
      VFCBK        - VIRTUAL FORMS BUFFER CONTROL BLOCK
      VFPBK        - Display/Dump Access List Control Block
      VINBK        - VMDUMP invocation block
      VIOMI        - Virtual I/O Management Information
      VIUBK        - VDEV I/O Assist Utilization Block
      VLABK        - VLAN Authorization List
      VLANITEM     - VLAN Authorization List
      VLCBK        - VLAN Counter Structure
      VLCCACHE     - Virtual Network Interface Card block
      VLDBK        - VLAN Definition Block
      VLDPG        - VLAN Definition Block
      VLDSEG       - VLAN Definition Block
      VMABK        - Virtual Machine Activity Block
      VMCBLOK      - VMCF COMMUNICATIONS BLOCK
      VMCMHDR      - VMCF COMMUNICATION MESSAGE HEADER
      VMCPARM      - VMCF COMMUNICATIONS PARAMETER LIST
      VMDBK        - VIRTUAL MACHINE DEFINITION BLOCK
      VMQBK        - Plist for call to HCPVMQSM
      VMUARYEN     - Virtual Machine CPU Usage block
      VMUBK        - Virtual Machine CPU Usage block
      VMUTOPEN     - Virtual Machine CPU Usage block
      VNABK        - Virtual Network Authorization Block
      VNCBK        - Virtual Network Command parameters
      VNPBK        - HCPVINOP extended parameter list block
      VOPBK        - HCPVOP simulation fetch/store work area
      VPABK        - Virtual Page Array (Guest Relocation)
      VPALE        - Virtual Page Array (Guest Relocation)
      VPARM        - FCP List Directed IPL Parameter List
      VPCI         - VPCI HASH QUEUE ANCHOR
      VPG64        - VIRTUAL PAGE BLOCK
      VPLBK        - VARY Command Syntax Plist Definitions
      VPXBK        - VIRTUAL PRINTER EXTENSION BLOCK
      VRDCBLOK     - VIRTUAL/REAL DEVICE CHARACTERISTICS BLOCK
      VRYBK        - VARY Command Control area
      VSABK        - Store Additional Status at Address
      VSMBK        - Vtam Service Machine control BlocK
      VSPBK        - VIRTUAL SPOOLING DEVICE BLOCK
      VUDBK        - Vestigial User Data Block
       WTop of page  WALOCCST     - CHANNEL PROGRAM DSECT BLOCK
      WALOCEST     - CHANNEL PROGRAM DSECT BLOCK
      WALOCFST     - CHANNEL PROGRAM DSECT BLOCK
      WDATA        - VSIM common DAta area mapping
      WEBBK        - Work Element Block
      WEIBK        - Work Element Identifier Block
      WIDBK        - Work Indirect Data address BlocK
      WIFBK        - "Will I Fit" RAS Block
      WRKKEY       - Working Key
      WRMBK        - Warmstart workarea overlay
      WRPBK        - HCPWRP message text
      WRTLBCST     - CHANNEL PROGRAM DSECT BLOCK
      WRTLBEST     - CHANNEL PROGRAM DSECT BLOCK
      WRTLBFST     - CHANNEL PROGRAM DSECT BLOCK
      WSDIRECT     - vSIE shadow-table directory mapping
      WSDIRENT     - vSIE shadow-table directory mapping
      WWPN         - Allows multiple WWPNs to be added to
       XTop of page  XBLBK        - XA buffer list block.
      XCRBK        - CP Exit Call Request Block
      XCTBK        - CP Exit Control Block
      XDIBK        - XDISK services messaging content
      XDRBK        - Expanded Storage Directory Block
      XDSBK        - XDISK services system information
      XITBK        - CP Exit Block
      XITPL        - Exit Plist
      XLDBK        - eXtent List Definition BlocK.
      XLDENTRY     - eXtent List Definition BlocK.
      XLKBK        - XDISK Cross-System Lock Structure
      XSEBK        - Expanded-Storage Element Block
      XSSRQBK      - Cross system SCIF request and reply blocks
      XSSRYBK      - Cross system SCIF request and reply blocks
      XSTMG        - Expanded storage management data
      XSUBK        - Expanded Storage Usability Map
      X0FFB        - Parm list pointers for exit 0FFB
      X00E0        - Parm list pointers for exit 00E0
      X00E1        - Parm list pointers for exit 00E1
      X11C0        - Parm list pointers for exit 11C0
      X11FF        - Parm list pointers for exit 11FF
      X1100        - Parm list pointers for exit 1100
      X1101        - Parm list pointers for exit 1101
      X1110        - Parm list pointers for exit 1110
      X117F        - Parm list pointers for exit 117F
      X1200        - Parm list pointers for exit 1200
      X1201        - Parm list pointers for exit 1201
      X1210        - Parm list pointers for exit 1210
      X1230        - Parm list pointers for exit 1230
      X1231        - Parm list pointers for exit 1231
      X3FE8        - Parm list pointers for exit 3FE8
      X4400        - Parm list pointers for exit 4400
      X4407        - Parm list pointers for exit 4407
       YTop of page  None
       ZTop of page  ZLCBK        - LOGO FILE TABLE BLOCK
      ZLEBK        - LOGO FILE LIST ENTRY BLOCK
      ZLXBK        - LOGO FILE EXTENSION BLOCK
      ZPLBK        - LOGO FILE PARM LISTS
      ZPMBK        - ZONE PARAMETER BLOCK
      ZSBBK        - Storage mapping for the results of
      ZSCBS        - HCPZSC BASES= plist

This information is based on z/VM 7.2.0 Last updated on 24 Jun 2020 at 10:17:27.
Copyright IBM Corporation, 1990, 2020