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
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
BER
Basic Error Rate
BERT
Basic Error Rate Test
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
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
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
EE
Enterprise Extenders
EEPROM
Electrically Erasable Programmable Only Memory
EHCI
Enhanced Host Controller Interface
EIDE
Enhanced IDE
EIGRP
Enhanced Interior Gateway Routing Protocol
EISA
Extended Industry Standard Architecture
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
EVPN
Ethernet Virtual Private Network
EVPN
Ethernet Virtual Private Networks
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
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
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
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
IEEE
Institute of Electrical and Electronics Engineers
IETF
Internet Engineering Task Force
IGMP
Internet Group Management Protocol
IGRP
Interior Gateway Routing Protocol
ILEC
Incumbent Local Exchange Carrier
IMC
Internet Mail Connector
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
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
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
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
LLC
Logical Link Control
LMI
Local Management Interface
LMTP
Local Mail Transfer Protocol
LPA
Link Pack Area
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
MTA
Message Transer Agent
MTS
Macro Temporary Storage
MTS
Michigan Terminal System
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
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
OSPF
Open Shortest Path First
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
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
PSTN
Public Switched Telephone Network
PTF
Program Temporary Fixes
PTS
PTF Temporary Storage
PUP
PARC Universal Packet
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
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
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
SNMP
Simple Network Management Protocol
SONET
Synchronous Optical Networking
SOS
SHARE Operating System
SPF
Sender Policy Framework
SPOOL
Simultaneous Peripheral Operations OnLine
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
UATA
Ultra ATA
UDP
User Datagram Protocol
UI
User Interface
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
USOC
Universal Service Order Code
USS
UNIX System Services
UTP
Unshielded Twisted Pair
UX
User Experience
VAX
Virtual Address Extension
VDSL
Very-high-bit-rate Digital Subscriber Line
VEPA
Virtual Ethernet Port Aggregator
vEth
Virtual Ethernet interface
VHCI
Virtual Host Controller Interface
VID
VLAN ID
VIP
Virtual IP
VLAN
Virtual LAN
VMS
Virtual Memory System
VNC
Virtual Network Computing
VNI
VXLAN Network Identifier
vPC
Virtual Port Channel
VPN
Virtual Private 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
XORP
Extensible Open Router Platform
XT
Extended Technology
zFS
z/OS File System