GSM약어

GSM 공부하면서 나왔던 약어들이에요.
참고하세요.

3GPP 3rd Generation Partnership Project

3GPP2 3rd Generation Partnership Project 2

3PTY Three Party Service

8-PSK 8-Phase Shift Keying

A3,A5,A8 Encryption Algorithms

A3 Authentication algorithm A3

A38 A single algorithm performing the function of A3 and A8

A5/1 Encryption algorithm A5/1

A5/2 Encryption algorithm A5/2

A5/X Encryption algorithm A5/0-7

A8 Ciphering key generation algorithm A8

AB Access Burst

AC Authentication Code

Access Class (C0 to C15)

Application Context

ACC Automatioc Congestion Control

ACCH Associated Control CHannel

ACP Adjacent Channel Power

ACK Acknowledgement

Abis BTS-BSC interface

ACELP Algebraic Code Excitation Linear Prediction

ACM Address Complete Message

Accumulated Call Meter

ACSE Association Control Service Element

ACU Antenna Combining Unit

ADC ADministration  Centre

Analogue to Digital Converter

ADN Abbereviated Dialling Number

ADPCM Adaptive Differential Pulse Code Modulation

AE Application Entity

AEC Acoustic Echo Control

AGCH Access Grant Channel

Ai Action indicator

A-MAP A-field MAP

AMR Adaptive Multi-Rate (codec)

ANM Answer Message

AoC Advice of Charge

AoCc Advice Of Charging Charging

AoCi Advice of Charging Information

ARC Access Right Class

ARD Access Right Details

ARFCN Absolute Radio Frequency Channel Number

ARI Access Right Identity

ARQ Automatic ReQuest for Retransmission

ASCI Advanced Speech Call Items

ASE Application Service Element

ASN.1 Abstract Syntax Notation one

ATM Asynchronous Transfer Mode

ATT ATTach

AU Access Unit

AuC Authentication Center

AUT(H) AUThentication

BA BCCH allocation

BAIC Barring of All Incomming Calls

BAOC Barring of All outgoing Calls

BCC Base Transceiver Station Color Code

BCH Broadcast Channel

BCCH Broadcast Control Channel

BCD Binary Coded Decimal

BCF Base station Control Function

BCIE Bearer Capability Information Element

BCS Block Check Sequence

BER Bit Error Rate

BFI Bad Frame Indication

BG Border Gateway

BIC-Roam Barring of Incoming Calls When Roaming Outside the Home PLMN

B-ISDN Broadband ISDN

Bm Mobile B Channel

BN Bit Number

BO all Baring of Outgoing call supplementary services

BOIC Barring of Outgoing International Calls

BOIC-exHC Barring of Outgoing International Calls except those to Home PLMN

BCD Binary Coded Decimal

BCM Broadcast Control Message

B-MAP B-field MAP

BMC Broadcast Message Control

BS Slow Broadcast Channel

Basic service (group)

Bearer Service

BSC Base Station Controller

BSG Basic service Group

BSIC Base Tranceiver Station Identity Code

BSIC-NCELL BSIC of an adjacent cell

BSS Base Station Subsystem

BSSAP Base Station System Application Part

BSSAP+ Base Station System Application Part+

BSSGP Base Station System GPRS Application Protocol

BSSMAP Base Station System Management Appliccation Part

BSSOMAP Base station System Operation and Maintenance Application Part

BTS Base Transceiver station

BTSM Base Transceiver Station Management

C higher layer control Channel (see CS and CF)

Conditional

CA Cell Allocation

CAI Call Advice Information

CAMEL Customized Applications for Mobile Network Enhanced Logic

CAP CAMEL Application Part

CB Cell Broadcast

CBC Connectionless Bearer Control

CBCH Cell Broadcast Channel

CBMI Cell Broadcast Message Identifier

CC Country Code

CCH Control CHannel

CCBS Completion of Call to Busy Subscriber

CCCH Common Control Channel

CCF Cluster Cotrol Function

CCFP Central Control Fixed Part

CCITT Comite Consultatif Internationale de Telegraphique et Telephonique

or Consultative Committee on International Telephone and Telegraphy

CCM Current Call Meter

CCP Capability/Configuration Parameter

CCPE Control Channel Protocol Entity 

Cct Circuit

CDMA Code Division Multiple Access

CDUR Chargeable DURation

CED called station identifier

CEF Central Control Function

CEFP Central Control Fixed Part

CEIR Central Equipment Identity Register

CELP Code Excited Linear Prediction Coding

CEND end of charge point

CEP Connection End Point

CEPT Conference des administrations Europeennes des Postes et Telecommunications

CF higher layer signalling Channel(fast)

CS higher layer signalling Channel(slow)

CFB Call Forwarding on Mobile Subscriber Busy

CFNRc Call Forwarding on Mobile Subscriber Not Reachable

CFNRy Call Forwarding on No Reply

CFU Call Forwarding Unconditional

CHP CHarging Point

CHV Card Holder Verification information

CI Cell Identifier

Common Interface

CIR Carrier to Interference Ratio

CK Cipher Key

CKSN Ciphering Key Sequence Number

C/L Connectionless

C/O Connection Oriented

CL higher layer ConnectionLess channel(protected)

CLF higher layer ConnectionLess channel(fast)

CLI Calling Line Identity

CLIP Calling Line(Number) Identification Presentation

CLIR Calling Line(Number) Identification Restriction

CLMS Connection Oriented Message Service

CLNS Connectionless Network Service

CLS higher layer ConnectionLess channel(slow)

CM Connection Management

CMC Connectionless Message Control

CMD CoMmanD

CMISE Common Management Information Service Element

CMM Channel Mode Modify

CN Core Network

CNG CalliNG tone

CODEC Corder/Decoder

COLI COnnected Line Identity

COLP Connected Line Identification Presentation

COLR Connected Line Identification Restriction

COM COMplete

COMS Connection Oriented Message Service

CONF Conference Calling

CONNACK CONNect ACKnowledgement

CONS Connection-Oriented Network Service

CPG Call Progress Message

C-Plane Control Plane

C/R Command/Response field bit

CRC Cyclic Redundancy Check

CRE Call RE establishment procedure

CSPDN Circuit Switched Public Data Network

CT Call Transfer

Call Transfer supplementary service

Channel Tester

Channel Type

CTR Common Technical Regulation

CTS Cordlesss Telephony System

CUG Closed User Group

CW Call Waiting

DAB Digital Audio Broadcast

DAC Digital to analogue Converter

DB Dummy Burst

DCCG Dedicate Control Channel

DCCH Dedicated Control Channel

DCE Data Circuit terminating Equipment

DCF Data Communication Function

DCN Data Communication Network

DCS1800 Digital Cellular System at 1800MHz

DECT Digital Enhanced Cordless Telecommunication

DET DETach

DISC DISConnect

DHCP Dynamic Host Configuration Protocol

DL Data Link (layer)

Dm Mobile D Channel

DLCI Data Link Connetion Identifier

DP Dial/Dialled Pulse

DNS Domain Name Service (mechanism)

DRX Discontinuous Reception

DSE Data Switching Exchange

DSI Digital Speech Interpolation

DSSI Digital subscriber Signalling No1

DSL Digital Subscriber Line

DTAP Direct Transfer Application Part

DTE Data Terminal Equipment

DTMF Dual Tone Multiple Frequency

DTX Discontinuous Transmission

DTAP Direct Transfer Application Part

DVB Digital Video Broadcast

EA External Alarms

EBSG Elementary Basic Service roup

ECM Error Correction Mode (facsimile)

Ec/No Ratio of energy per modulating bit to the noise spectral density

ECT Explicit call Transfer supplementary service

ECSD Enhanced Ciorcuit Switched Data

EDGE Enhanced Data Rates for GSM Evolution

EEL Electric Echo Loss

EFR Enhanced Full Rate (CODEC)

EGPRS Enhanced GPRS

EIR Equipment Identity Register

EL Echo Loss

EMC ElectroMagnetic Compatibility

eMLPP Enhanced Multi-Level Precedence and Pre-emption Service

EMMI Electrical Man Machine Interface

EOTD Enhanced Observed Time Difference

EPROM Ereasable Programmable Read Only Memory

ERMES European Radio Messaging Standard

ERP Ear Reference Point

Equivalent Radiated Power

ERR ERRor

ETR ETSI Technical Report

ETS European Telecommunication Standard

ETSI European Telecommunication Standards Institute

FA Full Allocation

Fax Adapter

FAC Final Assembly Code

FACCH Fast Associated Control Channel

FACCH/F Fast Associated Control Channel/Full rate

FACCH/F Fast Associated Control Channel/Half rate

FCAPS Fault. Configuration, Accounting, Performance, Security

FB Frequency Correction Burst

FCCH Frequency Correction Channel

FCS Frame Check Sequence

FDD Frequency Division Duplex

FDM Frequency Division Multiplex

FDMA Frequency Division Multiple Access

FDN Fixed Dialling Number

FEC Foward Error Correction

FER Frame Erasure Ratio

FH Frequency Hopping

FN TDMA Frame Number

FPH Freephone Service

FPLMTS Future Public Land Mobile Telecommunication System

FR Full rate

FTAM File Transfer Access and Management

ftn forwarded-to number

GCR Group Call Register

GEA Gateway GPRS Support Node

GMLC Gateway Mobile Location Center

GMSC Gateway Mobile-services Switching Centre

GMM GPRS Mobility Management

GMSC Gateway MSC

GMSK Gaussian Minimum Shift Keying

GPA GSM PLMN Area

GPRS General Packet Radio Service

GPS Global Positioning System

GSA GSM system Area

GSC GSM Speech Codec

GSM Global system for Mobile Comunication

GSM MS GSM Mobile Station

GSM PLMN GSM Public Land Mobile Network

GSMSS GSM Satelite System

GSN GPRS Support Node

GT Global Title

GTP GPRS Tunneling Protocol

HANDO HANDOver

HDLC High level Data Link Control

HLC High Layer Compatibility

HLR Home Location Register

HOLD Call hold supplementary service

HPLMN Home PLMN

HPU Hand Portable Unit

HR Half Rate

HSCSD High Speed Circuit Wsitched Data

HSN Hopping Sequence Number

HTML Hub]pertext Markup Language

HTTP Hypertext Transport Protocol

HU Home Units

I Information frames(RLP)

IA Incomming Access (closed user group SS)

IAM Initial Address Message

IC Interlock Code(CUG SS)

ICC Integrated Circuit(s) Card

IC(pref) Interlock Code of the preferential CUG

ICM In-Call Modification

ID IDentification/IDentity/IDentifier

IDN Integrated Digital Network

IE (signalling) Information Element

IEC International Electrotechnical Commission

IEI Information Element Identifier

I-ETS Interim European Telecommunications Standard

IMEI International Mobile Equipment Identity

IMSI International Mobile Subscriber Identity

IMT-2000 Internation Mobile Telephone System 2000

IN Intelligent Network

INAP Intelligent Network Application Part

IP Internet Protocol

IPv4 Internet Protocol Version 4

IPv6 Internet Protocol Version 6

ISC Internation Switching Center

ISDN Intergrated Services Digital Network

ISO International Organization for Standardization

ISUP ISDN User Part (of signalling system No.7)

ITC Information Transfer Capability

ITU International Telecommunication Union

IWF Interworking Function

IWMSC InterWorking MSC

IWU InterWorking Unit

k Windows size

K Constraint length of the convolutional code

Kc Cipher/Decipher Key

Ki Subscriber Authentication Key

L1 Layer 1

L2ML Layer 2 Management Link

L2R Layer 2 Relay

L2RBOP Layer 2 Relay Bit-Oriented Protocol

L2RCOP Layer 2 Relay Character-Oriented Protocol

L3 Layer 3

LA Location Area

LAC Location Area Code

LAI Location Area ID

LAN Local Area Network

LAPB Link Access Protocol Balanced

LAPDm Link Access Procedure D mobile

LCN Local Communication Network

LCS Location Services

LCSC LCS Client

LCSS LCS Server

LE Local Exchange

LEO Low Earth Orbiting satellite

LI Length IndicatorLeo

Line Identity

LLC Logical Link Control layer

Lm Traffic channel with capacity lower than a Bm

LMSI Local Mobile Subscriber Identity

LMU Location Measurement Unit

LND Last Number Dialled

LPC Long Term Prediction

LPLMN Local PLMN

LR Location Register

LSTR Listener SideTone Rating

LTE Local Terminal Emulator

LU Local Units

Location Update

LV Length and Value 

M Mandatory

MA Mobile Allocation

MAC Medium Access Control Layer

MACN Mobile Allocation Channel Number

MAF Mobile Additional Function

MAH Mobile Access Hunting

MAI Mobile Allocation Index

MAIO Mobile Application Part

MAP Mobile Application Part

MC Multi Carrier

MCC Mobile Country Code

MCI Malicious Call Identification

MD Mediation Device

MDL (mobile) Management (entity)   Data Link (layer)

ME Maintenance Entity

Mobile Equipment

MEF Maintenance Entity Function

MEO Medium Earth Orbiting satelite

MexE Mobile Statio Application Execution Environment

MF MultiFrame

MHS Message Handling System

MIC Mobile Interface Controller

MLC Mobile Location Centre

MM Mobility Management

MME Mobile Management Entity

MMI Man Machine Management

MNC Mobile Network Code

MNS Mobile Network Signalling

MO Mobile Originated

MO-LR Mobile Originating Location Request

MOS Mean Opinion Score

MoU Memorandum of Understanding

MPH (mobile) Management (entity) PHysical (layer) [primitive]

MPTY Multi Party Call

MRP Mouth Reference Point

MS Mobile Station

MSC Mobile Switching Center

MSCM Mobile Station Class Mark

MSCU Mobile Station Control Unit

MSIN Mobile Subscriber Identification Number

MSISDN Mobile Station ISDN Number

MSK Minimum Shift Keying

MSRN Mobile Station Roaming Number

MSS Mobile Satellite System

MT Mobile Terminateion

MT (0,1,2) Mobile Termination

MT-LR Mobile Terminating Location Request

MTM Mobile-To-Mobile (call)

MTP Message Transfer Part

MU Mark Up

MUMS Multi Usser Mobile Station

N/W Network

NB Normal Burst

NBIN A parameter in the hopping sequence 

NCC Network Colour Code

NCELL Neighbouring (of current serving) Cell

NCH Notification Channel

NDC Nation Destination Code

NDUB Network Determined User Busy

NE Network Element

NEF Network Element Function

NET Norme Europeenne de Telecommunications

NF Network Function

NIC Network Independent Clocking

NI-LR Network Induced Location Request

NM Network Management

NMC Network Management Centre

NMSI National Mobile Subscriber Identity

NMT Nordic Mobile Telephone

NPI Number Plan Indentifier

N-PDU Network Protocol Data Unit

NS Network Service

NSAP Network Service Access Point

NSAPI Network Layer Service Access Pointer Identifier

NT Network Termination

Non Transparent

NTAAB New Type Approval Advisory Board

NUA Network User Access

NUI Network User Identification

NUP National User Part (SS7)

O Optional

OA Outgoing Access (CUG SS)

O&M Operations & Maintenance

OACSU Off Air Call Set Up

OCB Outgoing Calls Barred within the CUG

OD Optional for operators to implement for their aim

OLR Overall Loudness Rating

OHG Operators Harmonization Group

OMAP Operation Maintenance and Administration Part

OMC Operation and Maintenance Center

OML Operations and Maintenance Link

OMSS Operation and Maintenance Subsystem

OS Operation System

OSI Open System Interconnection

OSI RM OSI Reference Model

P-IWMSC Packet Interworking MSC

PABX Private Automatic Branch eXchange

PACCH Packet Associated Control Channel

PAD Packet Assembly/Disassembly facility 

PAGCH Packet Access Grant Channel

PAR Process Access Request

PBCCH Packet Broadcast Control Channel

PBX Private Branch Exchange

PCCCH Packet Common Control Channel

PCH Paging Channel

PCM Pulse Code Modulation

PCN Personal Communication Network

PCS Personal Communication System

PD Protocol Discriminator

Public Data

PDA Personal Digital Assistant

PDCH Packet Data Channel

PDN Public Data Network

PDP Packet Data Protocol

PDTCH Packet Data Traffic Channel

PDU Protocol Data Unit

PH Packet Handler

PHysical (layer)

PHI Packet Handler Interface

PI Presentation Indicator

PICS Protocol Implementation Conformance Statement

PIN Personal Identification Number

PIXT Protocol Implementation eXtra information for Testing

PLL Physical Link Layer

PLMN Public Land Mobile Network

PNCH Packet Notification Channel

PNE Presentation des Normes Europeennes

POI Point Of Interconnection (with PSTN)

PP Point-to-Point

PPE Primative Procedure Entity

PPCH Packet Paging Channel

PRACH Packet Random Access Channel

Pref CUG Preferential CUG

PRN Provide Roaming Number

Ps Location probability

PSK Phase Shift Keying

PSPDN Packet Switched Public Data Network

PSTN Public Switched Telephone Network

PTCCH Packet Timing Advance Control Channel

PTM Point-to-Multipoint Service

PTM-G Point-to-Multipoint Service - Group Call

PTM-M Point-to-Multipoint Service - Multicast

P-TMSI Packet Temporary Mobile Subscriber Identity

PTP Point-to-Point Service

PUCT Price per Unit Currency Table

PW Pass Word

QA Q (Interface)   Adapter 

QAF Q Adapter Function

QN Quarter Bit Number

QoS Quality of service

R Value of Reduction of the MS transmitted RF power relative to the maximum

allowed output power of the highest  power class of MS (A)

RA Rate Adaptation

Random Area

RAB Random Access Burst

RACH Random Access Channel

RAI Routing Area Identity

RAND Random Number (for authentication)

RBER Residual Bit Error Ratio

RDI Restricted Digital Information

REC RECommendation

REJ REJect(ion)

REL Release

REQ REQuest

REVC Reverse Charging

RFCH Radio Frequency Channel

RF Radio Frequency

RFC Radio Frequency Channel

RFCH Radio Frequency CHannel

RFL Physical RF Layer

RFN Redued TDMA Frame Number

RFU Reserved for Future Use

RLC Radio Link Control Layer

RLC Release Complete

RLL Radio in the Local Loop

RLP Radio Link Protocol

RLR Receiver Loudness Rating

RMS Root Mean Square (value)

RNTABLE Table of 128 integers in the hopping sequence

ROSE Remote Operation Service Element

RPE Regular Pulse Excitation

RPOA Recognised Private Operating Agency

RR Radio Resource Management

RSE Radio System Entity

RSL Radio Signalling Link

RSZI Regional Subscription Zone Identity

RTE Remote Terminal Emulator

RXLEV Received signal level

RXQUAL Received Signal Quality

S/W SoftWare

SABM Set Asynchronous Balanced Mode

SACCH Slow Associated Control Channel

SACCH/C4 Slow Associated Control CHannel/SDCCH/4

SACCH/C8 Slow Associated Control CHannel/SDCCH/8

SACCH/T Slow Associated Control CHannel/Traffic channel

SACCH/TF Slow Associated Control CHannel/Traffic channel Full rate

SACCH/TH Slow Associated Control CHannel/Traffic channel Half rate

SAP Service Access Point

SAPI Service Access Point Indicator

SAT SIM Application Toolkit

SATIG Satelite Interest Group

SB Synchronization Burst

SC Service Centre (used for SMS)

Service Code

SCCP Signaling Connection Control Part

SCH Synchronization Channel

SCN Sub Channel Number

SCP Service Control Point

SDCCH Stand-alone Dedicate Control Channel

SDL Specification Description Language

SDMA Space Division Multiple Access

SDT SDL Development Tool

SDU Service Data Unit

SE Support Entity

SEF Support Entity Function

SFH Slow Frequency Hopping

SGSN Serving GPRS Support Node

SI Screening Indicator

Service Interworking

Supplementary Information (SIA=Supplemenatary Information A)

SID Silence Descriptor

SIFIC Send Info For Incomming Call

SIFOC Send Info For Outgoing Call

SIM Subscriber Identity Module

SLPP Subscriber LCS Privacy Profile

SLR Send Loudness Rating

SLTM Signalling Link Test Message

SM Session Management

SM-CP Short Message Control Protocol

SM-RP Short Message Relay Protocol

SME Short Message Entity

SMG Special Mobile Group

SMLC Serving Mobile Location Center

SMS Short Message Service

SMS-GMSC Short Message Service - Gateway MSC

SMS-IWMSC Short Message Service - Interworking MSC

SMS-SC Short Message Service - Service Center

SMSCB Short Message Service Cell Broadcast

SMS/PP Short Message Service/Point-to-Point

SMSS Switching and Management Subsystem

Smt Short message terminal

SN Subscriber Number

SNDCP Subnetwork Dependent Convergence Protocol

SNR Serial Number

Signal to Noise Ratio

SOA Suppress Outgoing Access (CUG SS)

SOSS Support of Operator Specific Service

SP Service Provider

Signalling Point

SPare

SPC Signaling Point Code

Suppress Preferential CUG

SRES Session Key (for authentication)

SRI Send Routing Info

SS Supplementary Services

System Simulator

SS7 Signalling System No. 7

SSC Supplementary Service Control string

SSL Secure Socket Layer

SSN Sub-System Number

SSP Service Switching Point

STMR SideTone Masking Rating

STP Signalling Transfer Point

SVN Software Version Number

T Timer

Transparent

Type only 

TA Terminal Adaptor

Timing Advance

TAC Type Approval Code

TACS Total Acceess System

TAF Terminal Adaptation Function

TBF Temporary Block Flow

TBR Technical Basis for Regulation

TC Transaction Capabilities

TCAP Transaction Capabilities Application Part

TCH Traffic Channel

TCH/F A full rate TCH

TCH/F2,4 A full rate data TCH (?2,4kbit/s)

TCH/F4,8 A full rate date TCH (4,8kbit/s)

TCH/F9,6 A full rate data TCH (9,6kbit/s)

TCH/FS A full rate Speech TCH

TCH/H A half rate TCH

TCH/H2,4 A half rate data TCH (?2,4kbit/s)

TCH/H4,8 A half rate data TCH (4,8kbit/s)

TCH/HS A half rate Speech TCH

TCI Transceiver Control Interface

TCP Transmission Control Protocol

TC-TR Technical Committee Technical Report

TD-CDMA Time Division CDMA

TDD Time Division Duplex

TDMA Time Division Muntiple Access

TD-SCDMA Time Divisio Synchronous CDMA

TE Terminal Equipment

Tei Terminal endpoint identifier

TETRA Terrestrial Trunked Radio

TFA TransFer Allowed

TFI Temporary Flow Identifier

TFO Tandem Free Operation

TFP TransFer Prohibited

TI Transaction Identifier

TID Tunel Identifier

TLLI Temporary Logical Link Identifier

TLS Transport Layer Security

TLV Type, Length and Value 

TMN Telecommunication Management Network

TMSI Temporary Mobile Subscriber Identity

TN Time Slot Number 

TOA Time of Arrival

TON Type Of Number

TRX Transceiver

TS Time Slot

Technical Specification

TeleService

TSC Training Sequence Code

TSDI Transceiver Speech & Data Interface 

TTCN Tree and Tabular Combined Notation

TUP Telephone User Part (SS7)

TV Type and Value

TXPWR Transmit PoWeR; Tx power level in the MS_TXPWR_REQUEST and MS_TXPWR_CONF parameters

UDI Unrestricted Digital Information

UDP User Datagram Protocol

UDUB User Determined User Busy

UI Unnumbered Information (Frame)

UIC Union Internationale des Chemins de Fer

Um Air/Radio Interface

UMTS Universal Mobile Telecommunication System

UPCMI Uniform PCM Interface (13-bit)

UPD Up to date

UPT Universal Personal Telecommunication

URAN UMTS Radio Access Network

URL Universal Resource Locator

USF Uplink State Flag

USSD Unstructured Supplementary Service Data

UTRA UMTS Terrestrial Radio Access

UTRAN UMTS Terrestrial Radio Access Network

UUS User to User Signaling

UWCC Universal Wireless Communication Consortium

V Value only 

VAD Voice Activity Detection

VBS Voice Broadcast Service

VGCS Voice Group Call Service

VLR Visited Location Register, VLR Number

VMSC Visited MSC, (recommendation not to be used)

VPLMN Visited PLMN

VSC Videotex Service Centre

V(SD) Send state variable

VTX host The components dedicated to Videotex service

W3C World Wide Web Consotrium

WAE Wireless Application Environment

WAP Wireless Application Protocol

WBMP Wireless Bitmap(Format)

W-CDMA Widebend CDMA

WDP Wireless Datagram Protocol

WLL Wireless Local Loop

WML Wireless Markup Language

WPA Wrong Password Attempts (counter)

WRC Wireless Session Protocol

WS Work Station

WTA Wireless Telephony Application

WTLS Wireless Transport Layer Security protocol

WTP Wireless Transaction Protocol

WWW World Wide Web

XID eXchange IDentifier

XML Extensible Markup Language

XSL Extensible Style Language

ZC Zone Code