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September 2000
Copyright 1989-2000
The following abbreviations are used:
| This... | Means... |
| ACF | Advanced Communications Function |
| ACF/NCP | Advanced Communications Function for the Network Control Program |
| ACTLU | activate logical unit |
| ACTPU | activate physical unit |
| ANR | automatic network routing |
| ANSI | American National Standards Institute |
| APL | A Programming Language |
| API | application programming interface |
| APPC | advanced program-to-program communications |
| APPN | Advanced Peer-to-Peer Networking |
| ARB | Adaptive Rate-Based flow control |
| ARP | Address Resolution Protocol |
| ASCII | American National Standard Code for Information Interchange |
| BIU | basic information unit |
| bps | bits per second |
| BrNN | branch network node |
| BSC | Binary Synchronous Communication |
| BSD | Berkeley Software Distribution |
| BTU | basic transmission unit |
| CD | carrier detected |
| CDI | change-direction indicator |
| CDSTL | connect data set to line |
| CICS | Customer Information Control System |
| CICS/VS | Customer Information Control System for Virtual Storage |
| CN | Connection Network |
| CNOS | change number of sessions |
| COS | class of service |
| CP | control point |
| CPI-C | Common Programming Interface for Communications |
| CPU | central processing unit |
| CRT | cathode ray tube |
| CTS | clear to send |
| CSMA/CD | carrier sense multiple access with collision detection |
| CSV | Common Service Verbs |
| CUD | call user data |
| CUT | control unit terminal mode |
| DACTLU | deactivate logical unit |
| DACTPU | deactivate physical unit |
| DAF | destination address field |
| DBCS | double-byte character set |
| DCD | data carrier detected |
| DCE | data circuit-terminating equipment |
| DD | device driver |
| DDDLU | dynamic definition of dependent LUs |
| DES | data encryption standard |
| DFC | data flow control |
| DFT | distributed function terminal |
| DLC | data link control |
| DLL | dynamic link library |
| DLPI | data link provider interface |
| DLU | dependent logical unit |
| DLUR | dependent logical unit requester |
| DLUS | dependent logical unit server |
| DMA | direct memory access |
| DR | definite response |
| DR1I | definite response 1 indicator |
| DR2I | definite response 2 indicator |
| DSR | data set ready |
| DTE | data terminal equipment |
| DTR | data terminal ready |
| EBCDIC | extended binary-coded decimal interchange code |
| EN | end node |
| EOF | end of file |
| ERP | error recovery procedures |
| ESC | escape character |
| ESCON | Enterprise Systems Connection |
| FCB | Forms Control Buffer |
| FD | full duplex |
| FDDI | fiber distributed data interface |
| FDX | full duplex |
| FEP | Front-End Processor |
| FM | function management |
| FMD | function management data |
| FMH | function management header |
| FTP | File Transfer Protocol |
| GB | gigabyte |
| GDS | general data stream |
| GID | group identifier |
| HD | half-duplex |
| HDLC | high-level data link control |
| HDX | half-duplex |
| HDXFF | half-duplex flip-flop |
| hex | hexadecimal |
| HLLAPI | High-Level Language Application Programming Interface |
| HPR | High-Performance Routing |
| HPR/IP | High-Performance Routing over Internet Protocol. See Enterprise Extender. |
| Hz | hertz |
| ID | identification or identifier |
| IEEE | Institute of Electrical and Electronics Engineers |
| ILU | independent logical unit |
| IMS | Information Management System |
| IMS/VS | Information Management System/Virtual Storage |
| I/O or IO | input/output |
| IP | Internet Protocol |
| IPC | interprocess communication |
| IPL | initial program load |
| ISR | intermediate session routing |
| JCL | Job Control Language |
| JES | Job Entry Subsystem |
| JIS | Japanese Industry Standard |
| Kb | kilobit |
| KB | kilobyte |
| LAN | local area network |
| LAP | link-access procedures |
| LAPB | link-access procedure balanced |
| LC | link control |
| LCN | logical channel number |
| LEN | low-entry networking |
| LFSID | local-form session identifier |
| LLC | logical link control |
| LS | link station |
| LTTI | Last Transaction Time Indicator |
| LU | logical unit |
| LU0 | Logical Unit Type 0 Application Programming Interface |
| LUA | Conventional LU Application Programming Interface |
| LU 0 | logical unit type 0 |
| LU 1 | logical unit type 1 |
| LU 2 | logical unit type 2 |
| LU 3 | logical unit type 3 |
| LU 6.2 | logical unit type 6.2 |
| LUWID | logical unit of work identifier |
| MAC | medium access control |
| Mb | megabit |
| MB | megabyte |
| MDS-MU | multiple domain support message unit |
| MHz | megahertz |
| MIB | Management Information Base |
| MS | management services |
| MVS | Multiple Virtual Storage |
| MVS/TSO | Multiple Virtual Storage/Time Sharing Option |
| NAP | Network Access Process |
| NAU | network accessible unit |
| NCCF | Network Communications Control Facility |
| NCP | Network Control Program |
| NL | new-line character |
| NMVT | network management vector transport |
| NN | network node |
| NOF | Node Operator Facility |
| NR | negative response |
| NRZ | non-return-to-zero |
| NRZ-1 | non-return-to-zero change-on-ones recording |
| NRZI | non-return-to-zero (inverted) recording |
| OAF | origin address field |
| ODAI | Origin Destination Assignor Indicator |
| OIA | operator information area |
| OS | operating system |
| PDIR | peripheral data information record |
| PID | process identifier |
| PIP | program initialization parameters |
| PIU | path information unit |
| PLU | primary logical unit |
| POSIX | Portable Operating System Interface for Computer Environments |
| PTT | Post, Telephone, and Telegraph |
| PU | physical unit |
| PUCP | physical unit control point |
| PU T2.0 | physical unit type 2.0 |
| PU T2.1 | physical unit type 2.1 |
| PU T4 | physical unit type 4 |
| PU T5 | physical unit type 5 |
| PVC | permanent virtual circuit |
| QLLC | qualified logical link control |
| RCF | Remote Command Facility |
| RFC | Request for Comments |
| RH | request header or response header |
| RISC | reduced instruction set computer |
| RJE | remote job entry |
| RSS | route selection services |
| RTM | response time monitor |
| RTP | Rapid Transport Protocol |
| RTPN | remote transaction program name |
| RTS | Request to Send |
| RU | request unit or response unit |
| RUI | Request Unit Interface |
| SAP | service access point |
| SATF | shared-access transport facility |
| SC | session control |
| SCS | SNA character string |
| SDLC | synchronous data link control |
| SJIS | Shift-Japanese Industrial Standard |
| SLU | secondary logical unit |
| SN | subarea node |
| SNA | Systems Network Architecture |
| SNMP | Simple Network Management Protocol |
| SPCF | Service Point Command Facility |
| SPM | sync point manager |
| SPS | sync point services |
| SSCP | system services control point |
| STDERR | standard error |
| STDIN | standard input |
| STDOUT | standard output |
| SVC | switched virtual circuit |
| TCP | Transmission Control Protocol |
| TCP/IP | Transmission Control Protocol/Internet Protocol |
| TDU | topology database update |
| TG | transmission group |
| TH | transmission header |
| TP | transaction program |
| TPN | transaction program name |
| TSO | Time Sharing Option |
| UCF | UNIX Command Facility |
| UDP | User Datagram Protocol |
| VC | virtual circuit |
| VCB | verb control block |
| VM | Virtual Machine |
| VM/CMS | Virtual Machine/Conversational Monitor System |
| VM/SP | Virtual Machine/System Product |
| VRN | virtual routing node |
| VSE | Virtual Storage Extended |
| VTAM | Virtual Telecommunications Access Method |
| WAN | wide area network |
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