3-D
three-dimensional
4-D
four-dimensional
AAS
advanced automation system
AATT
advanced air transportation technology
ACARS
aircraft communication addressing and reporting system
ACT
adaptive control of thought
ADS
automatic dependent surveillance
ADS-B
automatic dependent surveillance - broadcast mode
AERA
automated en route air traffic control
AFSS
automated flight service station
AIDC
air traffic control interfacility data communication
AILS
airborne information for lateral spacing
AM
amplitude modulation, arrival manager
AMASS
airport movement area safety system
AOAS
advanced oceanic automation system
AOC
airline operations center
AOD
airline operations department
ARSR
air route surveillance radar
ARTCC
air route traffic control center
ARTS
automated radar terminal system
ASDE
automated surface detection equipment
ASOS
automated surface observing system
ASRS
aviation safety reporting system
ASP
arrival sequencing program
ASR
airport surveillance radar
ASTA
airport surface traffic automation
ATC
air traffic control
ATCSCC
air traffic control system command center
ATIDS
aircraft target identification system
ATIS
airport terminal information service
ATM
air traffic management
AWOS
automated weather observing system
CA
conflict alert
CAATS
Canadian automated air traffic system
CAMI
Civil Aeromedical Institute
CDC
computer display channel
CDTI
cockpit display of traffic information
CDU
control display unit
CENA
Centre D'études del la navigation aérienne
CMM
capacity maturity model
COMPAS
Computer-oriented metering planning and advisory system
COTS
commercial off-the-shelf
CP
conflict prediction tool (may include URET, AERA functions)
CPDL
controller to pilot data link
CR
conflict resolution advisor (may include URET, AERA functions)
CRDA
converging runway display aid
CRM
crew resource management
CRT
cathode ray tube
CSCW
computer-supported cooperative work
CT
cooperative tools
CTAS
center TRACON automation system
CWSU
center weather service unit
DA
descent advisor
DARC
direct access radar channel
DBRITE
digital bright radar indicator tower equipment
DCC
display channel complex
DGPS
differential global positioning system
DM
departure manager
DoD
Department of Defense
DOTS
dynamic ocean tracking system
DSR
display system replacement
DUATS
direct user access terminal system
EDARC
enhanced direct access radar channel
EEC
Eurocontrol experimental center
EFIS
electronic flight instrument system
EFMS
experimental flight management system
ERM
en route metering
ERT
emergency reaction time
ESP
en route spacing program
ETMS
enhanced traffic management system
FAA
Federal Aviation Administration
FAATC
Federal Aviation Administration Technical Center
FAR
Federal Aviation Regulations
FAST
final approach spacing aid
FDIO
flight data input output system
FDP
flight data processing
FM
frequency modulation
FMA
final monitor aid
FMC
flight management computer
FMS
flight management system
FPM
flight path monitor
FSS
flight service station
GPS
global positioning system
GPWS
ground proximity warning system
GSD
graphic situation display
GWDS
graphic weather display system
HIPS
highly integrated problem solver
HSI
horizontal situation indicator
IBLS
integrity beacon landing system
IFR
instrument flight rules
ILS
instrument landing system
IPT
integrated product team
ITWS
integrated terminal weather system
LAAS
local area augmentation system
LLWAS
low-level wind shear alerting system
LOS
loss of separation
LVLAS
low-visibility landing and surface
MAMS
military airspace management system
MCC
maintenance control center
MLS
microwave landing system
MSAW
minimum safe altitude warning
MWP
meteorologist weather processor
NAS
national airspace system
NASA
National Aeronautics and Space Administration
NASA-TLX
National Aeronautics and Space Administration task load index
NARSIM
NLR air traffic control research simulator
NDI
nondevelopmental item
NEXRAD
next generation radar
NIMS
national airspace system infrastructure management system
NM
negotiations manager
NMAC
near-midair collision
NMCC
national maintenance coordination center
NOCC
national operations control center
NTSB
National Transportation Safety Board
NWS
National Weather Service
OAP
oceanic automation program
OASIS
operability and supportability implementation system
OCC
operations control center
ODAPS
oceanic display and planning system
ODID
operational display and input development
ODL
oceanic data link
PATS
PHARE advanced tool set
PFD
primary flight display
PGG
plan and goal graph
PHARE
program for harmonised air traffic management research in Eurocontrol
PIREPS
pilot reports
PRM
precision runway monitor
PS
problem solver
PVD
plan view display
R&D
research and development
RA
resolution advisory
RBDT
ribbon display terminal
RDP
radar data processing
RNAV
area navigation
RRT
recovery response time
RT
radiotelephone
RTCA
formerly the Radio Technical Committee on Aeronautics
RWSL
runway status lights
SAMS
special-use airspace management system
SATORI
situation assessment through recreation of incidents
SDTF
surface development and test facility
SIMMOD
airport and airspace simulation model
SIMNET
simulation network
SMA
surface movement advisor
STAR
studies, tests, and applied research
STARS
standard terminal automation replacement system
TACAN
tactical navigation
TAP
terminal area productivity
TCAS
traffic alert and collision avoidance system
TDWR
terminal Doppler weather radar
TLS
tactical load smoother
TMA
traffic management advisor
T-NASA
taxi navigation and situation awareness
TP
telecommunications processor, trajectory predictor
TRACON
terminal radar approach control
TTT
total transmission time
TVSR
terminal voice switch replacement
TWIP
terminal weather information for pilots
UAT
universal access transceiver
URET
user request evaluation tool
VFR
visual flight rules
VSCS
voice switching communication system
WAAS
wide area augmentation system
WARP
weather and radar processor
WSP
weather systems processor