ACC

Access and Configuration Control

ACS

Air Conditioning Subsystem

ADC

Atmospheric Dispersion Compensators

AG

Autoguiding

ANSI

American National Standard Institute

APD

Avalanche Photo-Diode

API

Application Programmatic Interface

ASM

Astronomical Site Monitor

AT

Auxiliary Telescope

ATS

Auxiliary Telescope System

ATCS

Auxiliary Telescope Control Software

ATM

Asynchronous Transfer Mode

BMS

Building Management System

CASE

Computer Aided Software Engineering

CCD

Charge Coupled Device

CCS

Central Control Software

CORBA

Common Object Request Broker Architecture

CPU

Central Processing Unit

CSU

Coudé Sensor Unit

DBL

(on-line) Data Base Loader

DBMS

Data Base Management System

DFS

Data Flow System

DIT

Effective Exposure Time (for FAS)

DL

Delay Line

DLCS

Delay Line Control Software

DSP

Digital Signal Processor

ECCS

Extended CCS

ECS

Enclosure Subsystem

EMC

Electromagnetic Compatibility

ESO

European Southern Observatory

EVH

Event Handling (Toolkit)

FDDI

Fiber Distributed Data Interface

FAS

Field Acquisition System

FDR

Final Design Review

FITS

Flexible Image Transport Format

FS

Field Stabilization

FSS

Field Stabilization System

FSU

Fringe Sensor Unit

FWHM

Full Width at Half Maximum

GIS

Ground Interface Structure

GS

Guide star

GUI

Graphical User Interface

HOS

High Level Operations Software

HW

Hardware

IAU

Internal Alignment Units

IBC

Imaging Beam Combiner

ICD

Interface Control Document

ICS

Instrument Control Software

IEE

Institution of Electrical Engineers

IEEE

Institute of Electrical and Electronics Engineers

ISO

International Standardization Organisation

INS

Instrumentation Software

I/O

Input/Output

ISS

Interferometer Supervisor Software

ISU

Image Sensor Unit

LADC

Longitudinal Atmospheric Dispersion Compensator

LAN

Local Area Network

LCC

LCU Common Software

LCM

Liquid Cooling Module

LCU

Local Control Unit

M<x>

Mirror # <x>

MIDAS

Munich Image Data Analysis System

N/A

Not Applicable

ND

Neutral Density

PSU

Pupil Sensor Unit

OLDB

On-Line Data Base

OO

Object Oriented

OPD

Optical Path Difference

OPL

Optical Path Length

OSI

Open Systems Interconnection

PE

Protective Earth (Electrical Ground)

PLC

Programmable Logic Controller

POM

Pointing Modeling

RDBMS

Relational Data Base Management System

ROS

Relay Optics Structure

RTAP

Real Time Application Platform

RTD

Real Time Display

SCCP

Software Configuration Control Plan

SNR

Signal to Noise Ratio

SRS

Software Requirements Specification

STRAP

System for Tip-tilt Removal with Avalanche Photodiodes

SW

Software

TADC

Transversal Atmospheric Dispersion Compensator

TBC

To Be Confirmed

TBD

To Be Defined

TCP/IP

Transmission Control Protocol / Internet Protocol

TCCD

Technical CCD System

TCS

Telescope Control Software

TIF

Telescope Interface

TIM

Time Interface Module

TO

Transfer Optics

TRS

Time Reference System

UC

Use Case

UIF

(Portable) User Interface (Toolkit)

UIT

Requested Exposure Time

UML

Unified Modeling Language

URL

Uniform Resource Locator

UT

Unit Telescope

UTC

Universal Time Coordinated

VCM

Variable Curvature Mirror

VIMA

VLT Interferometer Main Array

VISA

VLT Interferometer Sub-Array

VME

Versa Module Eurocard

VLT

Very Large Telescope

VLTI

VLT Interferometer

VLTICS

VLTI Control Software

WAN

Wide Area Network

WS

Workstation

ZPD

Zero Path Difference