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AA Associate Administrator
AAC Advanced Airspace Concept
AACS Advanced Airspace Computer System
AAF Associate Administrator for Airway Facilities
AAR Airport Acceptance Rate
AAS Advanced Automation System
AATT Advanced Air Transportation Technologies Project
AC or A/C Aircraft
ACARS Aircraft Communications Addressing and Reporting System
ACCC Area Control Computer Complex
ACES Airspace Concept Evaluation System
ACF Area Control Facility
AC/HR Aircraft Per Hour
ACID Aircraft ID or Aircraft Identification
ACLT Actual Calcualted Landing Time
A/D Arrival/Departure
ADIZ Air Defense Identification Zone
ADPE Automated Data Processing Equipment
ADS Automatic Dependent Surveillance
ADS-B Automatic Dependent Surveillance - Broadcast
ADU ARTS Data Unit
ADUI or ADU-I ARTS Data Unit Interface
ADUS or ADU-S ARTS Data Unit Software
AERA Automated En Route ATC
AF Airways Facilities
AFB Air Force Base
AGARD Advisory Group for Aerospace Research and Development
AIAA American Institute of Aeronautics and Astronautics
AID Aircraft Identifier or Aircraft Identification
AIM Aeronautical Information Manual
AMCC ARTCC Monitor and Control Center
AMDAR Aircraft Meteorological Data Relay
AN Data Analysis Software of CTAS
AOC Airline Operations Control
AOS Airspace Operations Systems
AOS FAA Operational Support Service
APP Approved
ARC Ames Research Center
ARD FAA Research and Development
ARINC Aeronautical Radio Inc.
ARSR Air Route Surveillance Radar
ARTCC Air Route Traffic Control Center
ARTS Automated Radar Terminal System
AS Airspace Systems Program
ASD Aircraft Situational Display
ASDI Aircraft Situation Display to Industry
ASEB Aeronautics and Space Engineering Board
ASP Arrival Sequencing Program
ASPM Aviation System Performance Metrics
ASR Airport Surveillance Radar
AT Air Traffic
ATC Air Traffic Control
ATAC Aerospace Technology Advisory Committee
ATCA Air Traffic Control Association, Inc.
ATCSCC Air Traffic Control System Command Center
ATCT Air Traffic Control Tower
ATL Atlanta Hartsfield International Airport
ATM Air Traffic Management
ATN Aeronautical Telecommunications Network
ATO Air Traffic Operations
ATS Air Transportation System
ATR Acceptance Test Review
ATR Air Traffic Plans and Requirements Service
ATR Air Traffic Requirements
ATSP Air Traffic Service Provider
AVA Adaptation Validation and Analysis
AVOSS Aircraft Vortex Spacing System
AVP Approximate Vertical Profile
AvSP Aviation Safety Program
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BDM Block Data Message
BITE Built-In-Test-Equipment
BRIMS Behavior Representation in Modeling and Simulation
BTS Bureau of Transportation Statistic
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C3I Command, Control, Communication, and Information
CAA Civil Aviation Authorities
CAASD Center for Advanced Aviaiton System Development (MITRE Corporation)
CAP Collaborative Arrival Planning
CAS Calibrated Air Speed
CCB Configuration Control Board
CCD Configuration Control Directive
CCFP Collaborative Convective Weather Forecast Product
CDDC Centralized Decision-making Distributed Control
CDLS Contractor Depot Logistics Support
CDR Continuous Data Recording
CDR Critical Design Review
CDRL Contract Data Requirements List
CDTI Cockpit Display of Traffic Information
CHI Computer Human Interface
CI Configuration Item
CI Communication Interface
CICT Computing, Information, and Communication Technologies
CIWS Corridor Integrated Weather System
CM Communications Manager
CM Communication Interface
CMF Configuration Management Facility
CMLS Contractor Maintenance and Logistics Support
CMO Configuration Management Organization
CNS Communication, Navigation, and Surveillance
CONOPS Concept of Operations
COTS Commercial Off-the-Shelf
CPE CTAS Processing Equipment
CPFS Computer Program Functional Specification
CPM Cognitive, Perceptual, and Motor
CPU Central Processing Unit
CR Crossing Restrictions
CRISD Computer Resources Integrated Support Document
CSC Computer Sciences Corporation
CSC Computer Software Component
CSCD CTAS Software Change Document
CSCI Computer Software Configuration Item
CSCR CTAS Software Change Request
CSMA/CD Carrier Sense Multiple Access with Collision Detection
CSOM Computer Systems Operators Manual
CSU Computer Software Unit
CTA Controlled Time of Arrival
CTAS Center/TRACON Automation System
CTOC Centralized Terminal Operation Control
CTRB CTAS Technical Review Board
CTS Coded Time Source
CVR Cockpit Voice Recorder
CVR Controlled Visual Rules
CVSRF Crew Vehicle Systems Research Facility
CW Continuous Wave
CWT Code Walk-Through
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DA Descent Advisor
DAC Dynamic Airspace Configuration
DACS Digital Aeronautical Chart Supplement
DAG Distributed Air/Ground
DAG-TM Distributed Air/Ground Traffic Management
DAN Data Analysis
DCN Document Change Notice
DEWIZ Distant Early Warning Identification Zone
DFW Dallas/Fort Worth International Airport
DID Data Item Description
DM Data Manager
DME Distance Measuring Equipment
DOD Department of Defense
DOF Degree of Freedom
DOT Department of Transportation
DP Dynamic Planner
DPA Delegation of Procurement Authority
DQT Design Qualification Test
DR&A Data Reduction and Analysis
DRL Data Requirements List
DRP Data Record/Playback
DRR Deployment Readiness Review
DSP Departure Sequencing Program
DSR Display System Replacement
DST Decision Support Tool
DSU Data Servicing Unit
DSUM Data Summary (Software)
DT&E Development Test and Evaluation
DYSIM Dynamic Simulator
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EDR Eddy Dissipation Rate
EDP Expedite Departure Path
EMC Electromagnetic Compatibility
EMI Electromagnetic Interference
EPR Engine-Pressure Ratio
ESP En Route Spacing Program
ETA Estimated Time of Arrival
ETD Estimated Time of Departure
ETG Enhanced Target Generator
ETL Environmental Technology Laboratory
ETMS Enhanced Traffic Management System
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FAA Federal Aviation Administration
FAALC FAA Logistics Center
FAATC FAA Technical Center
FACET Future ATM Concepts Evaluation Tool
FAF Final Approach Fix
FAR Federal Acquisition Regulation
FAR Field Action Request
FARGO Flight-Deck Automation for Reliable Ground Operation
FAST Final Approach Spacing Tool
FASTE Future Aeronautical Subnetwork Traffic Emulator
FAT Factory Acceptance Test
FCA Functional Configuration Audit
FCC Federal Communications Commission
FCFS First Come First Served (scheduling method)
FD Flight Deck
FDAD Full Digital ARTS Display
FDB Full Data Block
FDS Flight Data Set
FE Field Evaluation
FFC FutureFlight Central
FFRDC Federally-Funded Research and Development Center
FII Frequency Domain Interferometer Imaging
FIL FAST Information List
FMCW Frequency Modulated Continuous Wave
FMS Flight Management System
FOA Full Operational Assessment
FOC Full Operating Capability
FP Flight Plan
FPS Flight Progress Strip
FSD Full Scale Development
FY Fiscal Year
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GAR Gate Acceptance Rate
GFE Government Furnished Equipment
GFI Government Furnished Information
GFP Government Furnished Property
GMT Greenwich Mean Time (Zulu)
GOMS Goal, Operators, Methods, and Selection
GO-SAFE Ground-Operation Situation Awareness and Flow Efficiency
GPS Global Positioning System
GRC Glenn Research Center
GUI Graphical User Interface
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HCS Host Computer System
HID Host Interface Device
HID-I Host Interface Device Interface
HID-S Host Interface Device Software
HLA High Level Architecture
HQ Headquarters
HW Hardware
HWCI Hardware Configuration Item
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IAD Dulles International Airport
ICD Interface Control Document
I/CO Installation and Check Out
ID Identification
IDD Interface Design Document
IDL Interactive Data Language
IDR Incremental Design Review
IEEE Institute of Electrical and Electronics Engineers, Inc.
IFR Instrument Flight Rules
IIR Independent Implementation Review
ILS Instrument Landing System
ILS Integrated Logistics Support
ILSP Integrated Logistics Support Plan
IMC Instrument Meterological Conditions
INM Integrated Noise Model
I/O Input/Output
IOP Input Output Processor
IPC Inter Process Communication
IRD Interface Requirements Document
IRS Interface Requirements Specification
ISP Integrated Support Plan
ISSS Initial Sector Suite System
ITWS Integrated Terminal Weather Service
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JPDO Joint Planning and Development Office
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KDP Key Decision Point
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LAN Local Area Network
LaRC Langley Research Center
LDA Localizer Directional Aid
LIDAR Light Detection and Ranging
LLWAS Low Level Wind Shear Alert System
LNAV Lateral Navigation
LOA Limited Operational Assessment
LOA Letter of Agreement
LRI Line Replaceable Item
LRU Line Replaceable Unit
LRU Lowest Replaceable Unit
LSA Logistics Support Analysis
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MACH MACH number (speed ratio to speed of sound)
MAPR Multiple Antenna Profiler Radar
MAPS Meteorological and Aeronautical Presentation System
MAR Major Acquisition Review
MDCRS Meteorological Data Collection and Reporting System
MEANS MIT Extensible Air Network Simulation
MF Meter Fix
MFAR Meter Fix Acceptance Rate
MFT Meter Fix Time or Meter Fix Crossing Time
MIDAS Man-Machine Integration Design and Analysis System
MIL Military
MIT Miles-in-Trail
MIT-LL Massachusetts Institute of Technology - Lincoln Laboratory
MLDT Mean Logistics Delay Time
MMC Maintenance Monitor Console
MOA Memorandum of Agreement
MOU Memorandum of Understanding
MRD Maintenance Requirements Document
MS Milestone
MSL Maximum Stress Load
MSL Mean Sea Level
MTBF Mean-Time-Between-Failure
MTTR Mean-Time-to-Restore or Mean-Time-to-Repair
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NAILS National Airspace Integrated Logistics Support
NAILSMT NAILS Management Team
NAPRS National Airspace Performance Reporting System
NAR Non-Advocate Review
NAS National Airspace System
NASA National Aeronautics and Space Administration
NAVAID Navigational Aid
NCAR National Center for Atmospheric Research
NCP NAS Change Proposal
NDB Non-Directional Beacon
NDI Non-developmental Item
NextGen Next Generation
NFD Network Flow Diagram
NFDC National Flight Data Center
NGATS Next Generation Air Transportation System
NIMA NCARR Improved Moments Algorithm
NIRS Noise Integrated Routing System
NIU-I Network Interface Unit Interface
NIU-S Network Interface Unit Software
NM Nautical Miles
NMAC Near Midair Collision
NMI Nautical Miles
NOAA National Oceanic and Atmospheric Administration
NOWCAST Short-Term Weather Forecast, also called Short-Term Forecast
NRA NASA Research Announcement
NRT Non-Real-Time
NTIA National Telecommunications and Information Administration
NTSC Volpe National Transportation System Center
NTX North Texas Research Station for CTAS
NWIS NAS-Wide Information System
NWS National Weather System
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OAT Office of Aerospace Technology
ODAPS Oceanic Display and Planning System
ODP Object-oriented Dynamic Planner
OE Operating Environment
OEP Operational Evolution Plan
OETA Original Estimated Time of Arrival
OFT Outer Fix Time
OFX Outer Fix
OJT On-the-Job Training
OMB Office of Management and Budget
OMT Object Modeling Technique
OO Object-Oriented
OpsCon Operational Concept
OpsNet Operations Network
ORD Operational Readiness Demonstration
ORD Operational Requirements Document
OT&E Operational Test and Evaluation
OT&E/I OT&E/Integration
OT&E/O OT&E/Operational
OT&E/S OT&E/Shakedown
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PADS Planned Arrival and Departure System
PAMRI Peripheral Adapter Module Replacement Item
PAR Preferred Arrival Route
PAS Pseudo Aircraft System
PAT Prototype Adaptation Toolkit
PAT&E Production Acceptance Test and Evaluation
PBS Performance Based Services
PCA Physical Configuration Audit
PCA Positive Controlled Airspace
PDD Program Design Document
PDR Preliminary Design Review
PE PAMRI Emulator
PE-I PAMRI Emulator Interface
PE-S PAMRI Emulator Software
PFA Project Formulation Agreement
PFS Profile Selector
PGUI Planview Graphical User Interface
PHS&T Packaging, Handling, Storage, and Transportation
PM Program Manager
PMC Program Management Council
PMP Parts, Material, and Process
PR Problem Report
PR Procurement Request
PRR Program Readiness Review
PSR Program Status Review
PTP Point-to-Point
PTR Problem Trouble Report
PTR Program Technical Report
PVD Plan View Display (Radar Display)
PVMD Parallel Virtual Machine Daemon
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QA Quality Assurance
QCPP Quality Control Program Plan
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RA Route Analysis
RAID Redundant Array of Inexpensive Disks
RAMS Reorganized ATC Mathematical Simulator
RAR Runway Acceptance Rate
RASS Radio Acoustic Sounding System
R&D Research and Development
RFP Request for Proposal
RIACS Research Institution for Advanced Computer Science
RIM Range Imaging
RLV Reusable Launch Vehicle
RMA Reliability-Maintainability-Availability
RMMS Remote Maintenance Monitoring System
RMS Remote Monitoring System
RMS Root Mean Square
RNP Required Navigation Performance
RT Real-Time
RTCA formerly Radio Technical Committee on Aeronautics, now RTCA, Inc.
RTI Run Time Infrastructure
RTM Requirements Traceability Matrix
RUC Rapid Update Cycle
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SA Separation Assurance
SAA Space Act Agreement
SADRASS Spaced Antenna Drift Radio Acoustic Sounding System
SAR Search and Rescue
SAR Systems Analysis Recording
SAT Site Acceptance Test
SATS Small Aircraft Technology System
SBIR Small Business Innovative Research
SC Stream Class
SCSI Small Computer System Interface
SD Situation Display
SD Software Development
SDD Software Design Document
SDO Super-Density Operations
SDP Software Development Plan
SDT System Design Team or Systems Development Team
SE System Engineer
SEI System Engineering and Integration
SFO San Francisco International Airport
SHCT Short Haul Civil Tiltrotor
SID Standard Instrument Departure
SIMMOD Simulation Model
SISO Simulation Interoperability Standards Organization
SLDAST System-Level Design, Analysis, and Simulation Tools
SLS System Level Specification
SM System Manager
SM Sequence Monitor
SMC System Maintenance Console
SMC System Manager Console
SMMC System Maintenance Monitoring Console
SMO System Management Office
SMS Surface Management System
SMS System Management Station
SNMP Simple Network Management Protocol
SOAR Surface Operation Automation Research
SOW Statement or Work
SPM Software Programmers Manual
SR Software Review
SRS Software Requirements Specification
SSC Super Stream Class
SSDD System/Segment Design Document
SSPM Software Standards and Procedures Manual
STA Scheduled Time of Arrival
STAR Standard Terminal Arrival Route
STARS Standalone TRACON Automation Replacement System
STARS Standard Terminal Automation Replacement System
STD Scheduled Time of Departure
STD Standard
SUM Software Users Manual
SW Software
SWAP Severe Weather Avoidance Program
SWIM System-Wide Information Management
SWO System-Wide Optimization
SYSCO System-Supported Coordination
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TAAM Total Airspace and Airport Modeler
TAC Technical Assistance Contractor
TACAN Tactical Air Navigation
TACEC Terminal Area Capacity-Enhancing Concept
TAR TRACON Acceptance Rate
TARDIS Time and Relative Dimensions in Space
TARS Tethered Aerostat Radar System
TATCA Terminal Air Traffic Control Association
TBD To Be Determined
TCAS Traffic-alert and Collision Avoidance System
TCL Tool Command Language
TCP/IP Transmission Control Protocol/Internet Protocol
TDWR Terminal Doppler Weather Radar
T&E Test and Evaluation
TEMP Test and Evaluation Master Plan
TEP Turbulent Eddy Processor
TFAS Traffic Flow Automation System
TFM Traffic Flow Management
TGUI Timeline Graphical User Interface
TIM Technical Interchange Meeting
Tk Toolkit
TKE Turbulent Kinetic Energy
TMA Traffic Management Advisor
TMC Traffic Management Coordinator
TMI Traffic Management Systems Interface
TMS Traffic Management Station
TMS Traffic Management System
TMU Traffic Management Unit
TOC Top-of-Climb
TOD Top-of-Descent
TPL Total Path Length
TPSU Trajectory Prediction Synthesis and Uncertainty
TRACON Terminal Radar Approach Control
TRR Test Readiness Review
TS Trajectory Synthesis
TSAFE Tactical Separation Assisted Flight Environment
TSR Test Status Review
TTMA Terminal Traffic Management Advisor
TTMC TRACON Traffic Management Coordinator
TWI Two-Way Interface
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UAV Unmanned Aerial Vehicle
UCT Universal Coordinated Time
UEET Ultra-Efficient Engineering Technology
UHF Ultra High Frequency
UPR User Preferred Routing
UPS Uninterruptible Power Supply
USN United States Navy
UTC Universal Time Code (Zulu)
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VASE Virtual Airspace Simulation Environment
VAST Virtual Airspace Simulation Technologies
VDD Version Description Document
VFR Visual Flight Rules
VHF Very High Frequency
VMC Visual Meteorological Conditions
VNAV Vertical Navigation
VOR VHF Omnidirectional Ranges
VRTM Verification Requirements Traceability Matrix
V&V Verification and Validation
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WakeVAS Wake Vortex Advisory System
WAN Wide Area Network
WX Weather Systems Interface
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XM Execution Manager
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ZFW Fort Worth ARTCC
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NASA - National Aeronautics and Space Administration
NASA Official:
Last Updated: October 13, 2016

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