Glossary
I've decided to create a glossary page for some of the various terms / abbreviations / acronyms that I run into. I expect that I will sporadically be updating this page as I run into new terms.
- 2B1Q
- 2 Binary 1 Quaternary
- 3DES
- Triple Data Encryption Standard
- 4B3T
- 4 Binary 3 Ternary
- AAP
- Address Allocation Protocol
- ABEND
- Abnormal End
- ACF
- Advanced Communication Function
- ACI
- Cisco Application Centric Infrastructure
- ACP
- Airline Control Program
- ADM
- Add/Drop Multiplexer
- ADSL
- Asymmetric Digital Subscriber Line
- AES
- Advanced Encryption Standard
- AGP
- Accelerated Graphics Port
- AHCI
- Advanced Host Controller Interface
- AIX
- Advanced Interactive Executive
- ALCS
- Airline Control System
- AMI
- Alternate Mark Inversion
- ANSI
- American National Standards Institute
- APAR
- Authorized Program Analysis Report
- API
- Application Programming Interface
- ARC
- Authenticated Received Chain
- ARP
- Address Resolution Protocol
- ASB
- Automatic SYSIN Batching
- ASCII
- American Standard Code for Information Interchange
- ASN.1
- Abstract Syntax Notation One
- ASP
- Active Server Pages
- Attached Support Processor
- AT
- Advanced Technology
- ATA
- AT Attachment
- Analog Terminal Adapter
- ATAPI
- ATA Packet Interface
- ATDM
- Asynchronous Time-Division Multiplexing
- ATM
- Asynchronous Transfer Mode
- B3ZS
- Bipolar with 3-Zero Substitution
- B6ZS
- Bipolar with 6-Zero Substitution
- B8ZS
- Bipolar with 8-Zero Substitution
- BAC
- Building Automation and Control
- BBS
- Bulletin Board Systems
- BDAM
- Basic Direct Access Method
- BER
- Basic Encoding Rules
- Basic Error Rate
- BERT
- Basic Error Rate Test
- BFF
- Backup File Format
- BGP
- Border Gateway Protocol
- BIOS
- Basic Input / Output System
- BNF
- Backus-Naur Form
- BO
- Branch Office
- BPDU
- Bridge Protocol Data Unit
- BRI
- Basic Rate Interface
- BSC
- Binary Synchronous Communication
- BSD
- Berkeley Software Distribution
- BSDI
- Berkeley Software Distribution Inc.
- BSEPP
- Basic Systems Extensions Program Product
- BSOD
- Blue Screen of Death
- BTAM
- Basic Telecommunications Access Method
- CAL
- Client Access License
- CAM
- Content Addressable Memory
- CAN
- Campus Area Network
- CCW
- Channel Control Word
- CD-ROM
- Compact Disk Read Only Memory
- CER
- Canonical Encoding Rules
- CF
- Coupling Facility
- CGI
- Common Gateway Interface
- CHPID
- Channel Path ID
- CICS
- Customer Information Control System
- CIDR
- Classless Inter-Domain Routing
- CIFS
- Common Internet File System
- CIP
- Channel Interface Processor
- CISC
- Complex Instruction Set Computer
- CKD
- Count Key Data
- CLEC
- Competitive Local Exchange Carrier
- CLI
- Command Line Interface
- CLID
- Calling Line ID
- CLUI
- Command Line User Interface
- CMS
- Conversational Monitor System
- Cambridge Monitor System
- Console Monitor System
- CO
- Central Office
- COER
- Canonical Octet Encoding Rules
- COR
- Corrective service
- CoS
- Class of Service
- CP
- Control Program
- CPE
- Customer-Premises Equipment
- CPER
- Canonical Packed Encoding Rules
- CRC
- Cyclic Redundancy Check
- CRJE
- Conversational Remote Job Entry
- CSI
- Consolidated Software Inventory
- CSU
- Channel Service Unit
- CUPER
- Canonical Unaligned Packed Encoding Rules
- CXER
- Canonical XML Encoding Rules
- DARPA
- Defense Advanced Research Projects Agency
- DASD
- Direct Access Storage Device
- DCB
- Data Control Block
- DCE
- Data Communications Equipment
- DCL
- DIGITAL Command Language
- DDM
- Distributed Data Management Architecture
- DEC
- Digital Equipment Corporation
- DER
- Distinguished Encoding Rules
- DES
- Data Encryption Standard
- DID
- Direct Inward Dialing
- DKIM
- DomainKeys Identified Mail
- DLC
- Data Link Control
- DMA
- Direct Memory Access
- DMARC
- Domain-based Message Authentication, Reporting and Conformance
- DNS
- Domain Name System
- DNSSEC
- DNS Security Extensions
- DOS
- Disk Operating System
- DRDA
- Distributed Relational Database Architecture
- DS
- Digital Signaling
- DSA
- Digital Signature Algorithm
- DSCB
- Data Set Control Blocks
- DSL
- Digital Subscriber Line
- DSN
- Data Source Name
- Delivery Status Notification
- DSO
- Direct SYSOUT
- DSS
- Dynamic Support System
- DSU
- Data Service Unit
- DTE
- Data Terminal Equipment
- DTM
- Dynamic Synchronous Transfer Mode
- DVMRP
- Distance Vector Multicast Routing Protocol
- DWDM
- Dense Wavelength-Division Multiplexing
- EBCDIC
- Extended Binary Coded Decimal Interchange Code
- EBNF
- Extended BNF
- ECC
- Error-Correcting Code
- EDSAC
- Electronic Delay Storage Automatic Calculator
- EDVAC
- Electronic Discrete Variable Automatic Computer
- EE
- Enterprise Extenders
- EEPROM
- Electrically Erasable Programmable Only Memory
- eFix
- Emergency Fix
- EHCI
- Enhanced Host Controller Interface
- EIDE
- Enhanced IDE
- EIGRP
- Enhanced Interior Gateway Routing Protocol
- EISA
- Extended Industry Standard Architecture
- ENIAC
- Electronic Numerical Integrator and Computer
- EPROM
- Erasable Programmable Only Memory
- ERP
- Error Recovery Procedure
- ESA
- Enterprise Systems Architecture
- eSATA
- External SATA
- ESDI
- Enhanced Small Disk Interface
- ESDS
- Entry Sequenced Data Set
- ESF
- Extended Superframe
- ESI
- Edge Side Include
- ESO
- Expanded Service Options
- ESR
- Electronic Service Request
- ESR
- Electronic Service Request
- EVPN
- Ethernet Virtual Private Network
- EXCP
- Execute Channel Program
- EXCVR
- Execute Channel Program in Real Storage
- E-XER
- Extended XML Encoding Rules
- FC
- Fibre Channel
- FC-AL
- Fibre Channel Arbitrated Loop
- FCC
- Federal Communications Commission
- FC-FS
- Fibre Channel Point-to-Point
- FC-PI
- Fibre Channel Physical Interface
- FC-SW
- Fibre Channel Switched Fabric
- FEC
- Forwarding Equivalence Class
- FEX
- Fabric Extender
- FLASH
- Fujitsu Lightwave Add/Drop Shuttle
- FLM
- Fujitsu Lightwave Multiplexer
- FLPA
- Fixed Link Pack Area
- FQDN
- Fully Qualified Domain Name
- FR
- Frame Relay
- FRAD
- Frame Relay Access Device
- Frame Relay Assembly and Disassembly
- FTC
- Federal Trade Commission
- FTN
- FidoNet Technology Network
- FXO
- Foreign Exchange Office
- FXS
- Foreign Exchange Station
- GAM
- Graphics Access Method
- GARP
- Gratuitous ARP
- Gbps
- Gigabits per second
- GCOS
- General Comprehensive Operating System
- GDG
- Generation Data Groups
- GECOS
- General Electric Comprehensive Operating Supervisor
- GID
- Group ID
- GJP
- Graphic Job Processing
- GLBP
- Gateway Load Balancing Protocol
- GM-NAA I/O
- General Motors and North American Aviation I/O System
- GNU
- GNU's Not Unix
- GRE
- Generic Routing Encapsulation
- GSER
- Generic String Encoding Rules
- GSM
- Global System for Mobile Communications
- GSP
- Graphics Subroutine Package
- GUI
- Graphical User Interface
- GUID
- Globally Unique ID
- GVRP
- GARP VLAN Registration Protocol
- HASP
- Houston Automatic Spooling Priority
- HDB3
- High Density Bipolar of order 3
- HDLC
- High-Level Data Link Control
- HDSL
- High-Bit-Rate Digital Subscriber Line
- HFS
- Hierarchical File System
- HSRP
- Hot Standby Router Protocol
- HTML
- Hypertest Markup Language
- HTTP
- Hypertext Transfer Protocol
- HTTPS
- Hypertext Transfer Protocol Secure
- IANA
- Internet Assigned Numbers Authority
- IBM
- International Business Machines
- ICA
- Independent Computing Architecture
- ICMP
- Internet Control Message Protocol
- ICON
- ICSI Center for Open Networking
- ICSI
- International Computer Science Institute
- IDA
- Indirect Data Address
- IDE
- Integrated Drive Electronics
- IDS
- Intrusion Detection System
- IDS
- Intrusion Detection System
- IEEE
- Institute of Electrical and Electronics Engineers
- IETF
- Internet Engineering Task Force
- iFix
- Interim Fix
- IGMP
- Internet Group Management Protocol
- IGRP
- Interior Gateway Routing Protocol
- ILEC
- Incumbent Local Exchange Carrier
- ILM
- Incoming Label Map
- ILM
- Incoming Label Map
- IMC
- Internet Mail Connector
- IML
- Initial Microcode Load
- IMS
- Information Management System
- Internet Mail Service
- IOCDS
- Input/Output Configuration Data Set
- IOCP
- Input/Output Configuration Program
- IP
- Internet Protocol
- IPIP
- IP in IP Encapsulation
- IPL
- Initial Program Load
- IPS
- Intrusion Prevention System
- IPSec
- IP Security
- IPX
- Internetwork Packet Exchange
- IRB
- integrated routing and bridging
- IRQ
- Interrupt Request
- ISA
- Industry Standard Architecture
- Instruction Set Architecture
- ISAM
- Indexed Sequential Access Method
- ISATAP
- Intra-Site Automatic Tunnel Addressing Protocol
- ISDN
- Integrated Services Digital Network
- IS-IS
- Intermediate System to Intermediate System
- ISO
- International Organization for Standardization
- ISPF
- Interactive System Productivity Facility
- ITF
- Interactive Terminal Facility
- ITU
- International Telecommunication Union
- JCL
- Job Control Language
- JECL
- Job Entry Control Language
- JER
- JSON Encoding Rules
- JES
- Job Entry Subsystem
- JES1
- JES for OS/VS1
- JES2
- HASP JES
- JES3
- ASP JES
- JSON
- JavaScript Object Notation
- kbps
- kilobits per second
- KSDS
- Key Sequenced Data Set
- L2TP
- Layer 2 Tunneling Protocol
- LAN
- Local Area Network
- LAP
- Link Access Procedure
- LAPB
- LAP Balanced
- LAPD
- LAP for D Channel
- LAPF
- LAP for Frame Relay
- LAPM
- LAP for Modems
- LATA
- Local Access and Transport Area
- LDA
- Local Delivery Agent
- LDAP
- Lightweight Directory Access Protocol
- LDS
- Linear Data Set
- LEC
- Local Exchange Carrier
- LER
- Label Edge Router
- LER
- Label Edge Router
- LIC
- Licensed Internal Code
- LLC
- Logical Link Control
- LMI
- Local Management Interface
- LMTP
- Local Mail Transfer Protocol
- LPA
- Link Pack Area
- LPP
- Licensed Program Products
- LSR
- Label Switching Router
- MAC Address
- Media Access Control Address
- MAN
- Metropolitan Area Network
- Mbps
- Megabits per second
- MCA
- Micro Channel Architecture
- MCH
- Machine Check Handler
- MCP
- Message Control Program
- MDN
- Message Disposition Notification
- MEC
- Multi-Chassis Etherchannel
- MFT
- Multiprogramming with a Fixed number of Tasks
- MJ
- Modular Jack
- MLAG
- Multi-Chassis Link Aggregation Group
- MLPA
- Modified Link Pack Area
- MMJ
- Modified Modular Jack
- MPP
- Message Processing Programs
- MSA
- Message Submission Agent
- MSS
- Maximum Segment Size
- MTA
- Message Transer Agent
- MTS
- Macro Temporary Storage
- Michigan Terminal System
- MTU
- Maximum Transmission Unit
- Multics
- Multiplexed Information and Computing Service
- MVRP
- Multiple VLAN Registration Protocol
- MVS
- Multiple Virtual Storage
- MVT
- Multiprogramming with a Variable number of Tasks
- NBF
- NetBIOS Frame
- NBMA
- nonbroadcast multiple-access network
- NBT
- NetBIOS over TCP/IP
- NBX
- NetBIOS over IPX/SPX
- NCP
- Network Control Program
- NetBEUI
- NetBIOS Extended User Interface
- NetBIOS
- Network Basic Input/Output System
- NFV
- Network Function Virtualization
- NHLFE
- Net Hop Label Forwarding Entry
- NIC
- Network Interface Card
- NIM
- Network Installation Manager
- NJE
- Network Job Entry
- NNI
- Network to Network Interface
- NPIV
- N-Port ID Virtualization
- NRZ
- non-return-to-zero
- NRZC
- non-return-to-zero change
- NRZI
- non-return-to-zero inverted
- NRZL
- non-return-to-zero level
- NRZM
- non-return-to-zero mark
- NRZS
- non-return-to-zero space
- NVC
- Network Virtualization Controller
- OADM
- Optical Add/Drop Multiplexer
- OAM
- Operations, Administration, and Maintenance
- OAM&P
- Operation Administration, Maintenance and Provisioning
- OC
- Optical Carrier
- OCCS
- Optical Cross Connect System
- OER
- Octet Encoding Rules
- OHCI
- Open Host Controller Interface
- OLSR
- Optimized Link State Routing
- OMVS
- Open MVS
- OS
- Operating System
- OSA
- Open Systems Adapter
- OSI
- Open Systems Interconnection
- OSMP
- OS Maintenance Program
- OSPF
- Open Shortest Path First
- OVS
- Open vSwitch
- PAgP
- Aggregation Protocol
- PAM
- Pluggable Authentication Modules
- Pulse Amplitude Modulation
- PARS
- Programmed Airline Reservations System
- PATA
- Parallel ATA
- PBX
- Private Branch Exchange
- PC
- Personal Computer
- PCI
- Peripheral Component Interconnect
- PCI-E
- PCI Express
- PCI-X
- PCI Extended
- PCM
- Pulse-Code Modulation
- PCP
- Primary Control Program
- PDH
- Plesiochronous Digital Hierarchy
- PDP
- Programmed Data Processor
- PDS
- Partitioned Data Set
- PEM
- Privacy Enhanced Mail
- PER
- Packed Encoding Rules
- PHP
- PHP Hypertext Preprocessor
- PHY
- Physical Layer Chip
- PIM
- Protocol-Independent Multicast
- PIM-DM
- PIM - Dense Mode
- PIM-SM
- PIM - Sparse Mode
- PIM-SSM
- PIM - Source-Specific Mode
- PKCS
- Public Key Cryptography Standards
- PLC
- Programmable Logic Controller
- PLIP
- Parallel Line IP
- PLPA
- Permanent Link Pack Area
- PMR
- Problem Management Report
- Policy Based Routing
- PBR
- POSIX
- Portable Operating System Interface
- POTS
- Plain Old Telephone Service
- PPP
- Point-to-Point Protocol
- PPTP
- Point-to-Point Tunneling Protocol
- PRI
- Primary Rate Interface
- PRL
- potential routers list
- PROM
- Programmable Read Only Memory
- PSN
- Packet Switched Network
- PSTN
- Public Switched Telephone Network
- PTF
- Program Temporary Fix
- PTS
- PTF Temporary Storage
- PUP
- PARC Universal Packet
- PUT
- Program Update Tape
- QAM
- Quadrature Amplitude Modulation
- QoS
- Quality of Service
- QTAM
- Queued Telecommunications Access Method
- RACF
- Resource Access Control Facility
- RDP
- Remote Desktop Protocol
- RES
- Remote Entry Services
- RFB
- Remote Frame Buffer
- RG
- Radio Grade
- RIOT
- routing in and out of tunnels
- RIP
- Routing Information Protocol
- RISC
- Reduced Instruction Set Computer
- RJ
- USOC Registered Jack
- RJE
- Remote Job Entry
- ROM
- Read Only Memory
- RPMS
- Realtime Plant Management System
- RRDS
- Relative Record Data Set
- RS
- Recommended Standard
- RSTP
- Rapid Spanning Tree Protocol
- RSU
- Recommended Service Upgrade
- RTCP
- Real Time Control Protocol
- RTP
- Real-time Transport Protocol
- RTSP
- Real Time Streaming Protocol
- RZ
- Return-to-Zero
- SABRE
- Semi-Automatic Business Research Environment
- SAP
- Session Announcement Protocol
- SATA
- Serial ATA
- SATAe
- SATA Express
- SBB
- System Building Block
- SCO
- Santa Cruz Operation
- SCP
- Secre Copy
- SCSI
- Small Computer Systems Interface
- SDH
- Synchronous Digital Hierarchy
- SDLC
- Synchronous Data Link Control
- SDN
- Software Defined Network
- SDP
- Session Description Protocol
- SDSL
- Symmetric Digital Subscriber Line
- SF
- Superframe
- SGJP
- Satellite Graphic Job Processing
- SLIP
- Serial Line IP
- SMB
- Server Message Block
- SMP/E
- System Modification Program/Extended
- SMTP
- Simple Mail Transfer Protocol
- SNA
- Systems Network Architecture
- SNAP
- Subnetwork Access Protocol
- Simple Network Management Protocol
- SONET
- Synchronous Optical Networking
- SOS
- SHARE Operating System
- SPE
- Small Program Enhancement
- SPF
- Sender Policy Framework
- SPOOL
- Simultaneous Peripheral Operations OnLine
- SPOT
- Shared Product Object Tree
- SPX
- Sequenced Packet Exchange
- SRTOS
- Special Real Time Operating System
- SS5
- Signaling System 5
- SS7
- Signaling System 7
- SSDP
- Simple Service Discovery Protocol
- SSH
- Secure Shell
- SSI
- Server Side Include
- SSL
- Secure Sockets Layer
- SSM
- Source-Specific Multicast
- STDM
- Statistical Time-Division Multiplexing
- STM
- Synchronous Transport Modules
- STP
- Shielded Twisted Pair
- Spanning Tree Protocol
- STS
- Source Temporary Storage
- SVC
- Supervisor Call instruction
- SVG
- Scalable Vector Graphics
- SVS
- Single Virtual Storage
- SYSGEN
- System Generation
- TA
- Terminal Adapter
- TCAM
- Telecommunications Access Method
- Ternary CAM
- TCP
- Transmission Control Protocol
- TDM
- Time-Division Multiplexing
- TDMA
- Time-Division Multiple Access
- TLS
- Transport Layer Security
- TOR
- top of rack
- TP
- Teleprocessing Monitor
- TPF
- Transaction Processing Facility
- TSO
- Time Sharing Option
- TTL
- Time To Live
- Transistor Transistor Logic
- TUI
- Text User Interface
- UART
- Universal Asynchronous Receiver and Transmitter
- UATA
- Ultra ATA
- UDP
- User Datagram Protocol
- UI
- User Interface
- UID
- User ID
- UML
- User Mode Linux
- UNC
- Universal Naming Convention
- UNI
- User Network Interface
- UPER
- Unaligned Packed Encoding Rules
- URI
- Uniform Resource Identifier
- URL
- Uniform Resource Locator
- USB
- Universal Serial Bus
- USL
- UNIX System laboratories
- USOC
- Universal Service Order Code
- USS
- UNIX System Services
- UTP
- Unshielded Twisted Pair
- UUCP
- Unix to Unix Copy
- UUID
- Universally Unique ID
- UX
- User Experience
- VAX
- Virtual Address Extension
- VDSL
- Very-high-bit-rate Digital Subscriber Line
- VEPA
- Virtual Ethernet Port Aggregator
- VERP
- Variable Envelope Return Path
- vEth
- Virtual Ethernet interface
- VHCI
- Virtual Host Controller Interface
- VLAN ID
- VIP
- Virtual IP
- VLAN
- Virtual LAN
- VLL
- Virtual Leased Line
- VMS
- Virtual Memory System
- VNC
- Virtual Network Computing
- VNI
- VXLAN Network Identifier
- vPC
- Virtual Port Channel
- VPLS
- Virtual Private LAN Service
- VPN
- Virtual Private Network
- VPRN
- Virtual Private Routed Network
- VPS
- Virtual Private Server
- VRF
- Virtual Routing and Forwarding
- VRRP
- Virtual Router Redundancy Protocol
- VS
- Virtual Storage
- VSAM
- Virtual Storage Access Method
- VSE
- Virtual Storage Extended
- VSS
- Virtual Switching System
- VTAM
- Virtual Telecommunications Access Method
- VTEP
- VXLAN Tunnel End Point
- VTOC
- Volume Table of Contents
- VXLAN
- Virtual Extensible LAN
- WAN
- Wide Area Network
- WDM
- Wavelength-Division Multiplexing
- XER
- XML Encoding Rules
- Xerox PARC
- Xerox Palo Alto Research Center
- xHCI
- Extensible Host Controller Interface
- XHTML
- Extensible Hypertext Markup Language
- XML
- Extensible Markup Language
- XORP
- Extensible Open Router Platform
- XT
- Extended Technology
- zFS
- z/OS File System