Kısaltmalar

Aviyonik sektörü, hava taşıtlarının elektronik sistemlerinin tasarımı, üretimi ve bakımı ile ilgili bir alandır. Bu sektörde, karmaşık sistemlerin ve işlemlerin anlaşılmasını kolaylaştırmak amacıyla çeşitli kısaltmalar yaygın olarak kullanılmaktadır. Bu kısaltmalar, sektör profesyonelleri arasında hızlı ve etkili iletişim sağlamak için büyük önem taşır. Ancak, sektöre yeni başlayanlar veya dışarıdan bakanlar için bu kısaltmalar, anlaşılması güç bir dil gibi görünebilir. Bu nedenle, aviyonik terimlerini ve kısaltmalarını detaylı bir şekilde açıklamak, bu karmaşık alanın daha iyi anlaşılmasına yardımcı olacaktır.

Bu amaçla hazırlanan liste, okuyucuların aviyonik sektöründeki temel kavramları ve teknik dili anlamalarına yardımcı olmak için tasarlanmıştır. Aradığınız kısaltmayı bulamadıysanız ya da açıklamadan emin değilseniz bizimle iletişime geçmekten çekinmeyiniz.

İşte aviyonik sektöründe sıkça karşılaşılan bazı önemli kısaltmalar ve terimlerin açıklamaları:

A/A	Air-to-Air
A/C	Aircraft
A/D	Analog To Digital
A/G	Air-to-Ground
A/P	Autopilot
A429	ARINC 429
ABAS	Aircraft-Based Augmentation System
ABROAD	ADS Broadcast
AC	Advisory Circular (FAA)
ACARS	Aircraft Communications Addressing and Reporting System
ACAS	Airborne Collision Avoidance System
ACC	Area Control Center
ACE	Actuator Control Electronics
ACMS	Aircraft Condition Monitoring System
ACO	Aircraft Certification Office (FAA) (Reorganized as Certification Branches as of 2023)
ACP	Audio Control Panel
ACS	Audio Control System
AD	Airworthiness Directive
ADAHRS	Air Data and Attitude Heading Reference System
ADC	Air Data Computer, or Analog-To-Digital Converter
ADC	Analog-to-Digital Converter
ADF	Automatic Direction Finder
ADI	Attitude Director Indicator
ADIRS	Air Data Inertial Reference System
ADIRU	Air Data Inertial Reference Unit
ADM	Air Data Module
ADR	Airborne Data Reception
ADS	Automatic Dependent Surveillance
ADS-A	Automatic Dependent Surveillance-Address
ADS-B	Automatic Dependent Surveillance-Broadcast
ADS-C	Automatic Dependent Surveillance-Contract
ADSB	Alternating Double Sideband
AEH	Airborne Electronic Hardware
AESA	Active Electronically Scanned Array
AFCS	Automatic Flight Control System
AFD	Autopilot Flight Director
AFDC	Autopilot Flight Director Computer
AFDS	Autopilot Flight Director System
AFDX	Avionics Full-Duplex Switched Ethernet
AGACS	Automatic Ground-Air Communication System
AGC	Automatic Gain Control
AGDL	Air-Ground Data Link
AHC	Attitude Heading Control
AHRS	Attitude Heading Reference System
AI	Action Item
AIDS	Aircraft Integrated Data
AIM	Aeronautical Information Manual
AIP	Aeronautical Information Publication
AIR	Aerospace Information Report
AIS	Airmen’s Information System
AL	Assurance Level
ALT	Altitude
ALU	Arithmetic Logic Unit
AM	Amplitude Modulation
AMC	Acceptable Means of Compliance, or Alternative Means of Compliance
AMS	Air Management System
ANC	Active Noise Cancellation
ANN	Annunciator
ANR	Active Noise Reduction
ANSI	American National Standards Institute
ANT	Antenna
AOC	Aeronautical Operational Control
AOP	Airport Operating Plan
AOPA	Aircraft Owners and Pilots Association
APARS	Automatic Pressure Altitude Reporting System
APS	Auto Pilot System
APU	Auxiliary Power Unit
APV	Approach with Vertical Guidance
ARINC	Aeronautical Radio, Incorporated
ARM	Advanced RISC Machine
ARP	Aerospace Recommended Practice (via Society of Automotive & Aerospace Engineers)
ARW	Airborne Rotary Winged
ASA	Aircraft Safety Assessment
ASCII	American Standard Code for Information
ASD	Aircraft Situation Display
ASDL	Aeronautical Satellite Data Link
ASIC	Application Specific Integrated Circuit
ASR	Airport Surveillance Radar
ASSP	Application Specific Standard Product
ASTERIX	All Purpose Structured Eurocontrol Surveillance Information Exchange
ASU	Avionics Switching Unit
AT	Auto Throttle
ATC	Amended Type Certificate
ATC	Air Traffic Control
ATCRBS	Air Traffic Control Radar Beacon System
ATCSS	Air Traffic Control Signaling System
ATCT	Airport Traffic Control Tower
ATE	Automatic Test Equipment
ATIS	Automated Terminal Information Service
ATM	Air Traffic Management
ATP	Acceptance Test Procedure
ATS	Air Traffic Service
ATSAW	Airborne Traffic Situational Awareness
ATSU	Air Traffic Services Unit
ATT	Attitude
Avionics	Aviation Electronics
AVN	Office of Aviation System Standards
AWACS	Advanced Warning and Control Systems
AWOS	Automated Weather Observation System
B-RNAV	Basic Area Navigation
BARO	Barometric Indication, Setting or Pressure
BC	Bus Controller
BCD	Binary Coded Decimal
BDI	Bearing Distance Indicator
BFO	Beat Frequency Oscillator
BGAN	Broadcast Global Area Network
BIT	Built-In Test
BITE	Built-In Test Equipment
BNR	Binary
BOM	Bill of Materials
BRAM	Block RAM
CA	Criticality Analysis
CAA	Civil Aeronautics Administration
CAS	Calibrated Airspeed
CAST	Certification Authorities Software Team
CAT	Catastrophic (when referring to a “Safety” aspect; otherwise may refer to “Category”)
CAT I	Operational Performance Category 1
CAT II	Operational Performance Category II
CAT IIIa	Operational Performance Category IIIa
CAT IIIb	Operational Performance Category IIIb
CAT IIIc	Operational Performance Category IIIc
CBIT	Continuous Built-In Test
CC	Change Control or Control Category
CC1	Control Category 1
CC2	Control Category 2
CCA	Common Cause Analysis or Circuit Card Assembly
CCB	Change Control Board
CDA	Continuous Descent Approach
CDI	Course Deviation Indicator
CDR	Critical Design Review
CDR	System Critical Design Review
CDRL	Contract Data Requirements List
CDTI	Common Cause Analysis, or Circuit Card Assembly
CDU	Control Display Unit
CEH	Complex Electronic Hardware
CFIT	Controlled Flight Into Terrain
CFR	Code of Federal Regulations
CI	Configuration Item
CID	Configuration Index Document
CIDS	Cabin Intercommunication Data System
CII	Configuration Item Index
CM	Configuration Management
CMA	Common Mode Analysis
CME	Configuration Management Engineer
CMOS	Complementary Metal-Oxide Semiconductor
CMP	Configuration Management Plan
CMR	Certification Maintenance Requirement
CMS	Configuration Management Specialist
CNS	Communication, Navigation, Surveillance
CoC	Certificate of Conformity
CODEC	Coder/Decoder
COM	Communication
COMM	Communications Receiver
COTS	Commercial Off-The-Shelf
COTS	Commercial Off the Shelf
CPDLC	Controller
CPS	Cycles Per Second
CPU	Central Processing Unit
CR	Change Request
CRC	Cyclic Redundancy Check
CRC	Cyclic Redundancy Check, or Cyclic Redundancy Code
CRI	Certification Review Item
CRT	Cathode Ray Tube
CS	Certification Specification
CSCI	Computer Software Configuration Item
CSV	Comma Separated Values
CTAF	Common Traffic Advisory Frequency
CV/DFDR	Cockpit Voice And Digital Flight Data Recorder
CVE	Certification Verification Engineer
CVR	Cockpit Voice Recorder
CW	Continuous Wave
CWS	Control Wheel Steering
DA	Decision Altitude
DA	Drift Angle
DAC	Digital-to-Analog Converter
DAC	Digital to Analog Conversion
DAL	Design Assurance Level
DAL	Development Assurance Level
DAPs	Downlink Of Aircraft Parameters
DAR	Designated Airworthiness Representative
DB	Database
DC	Direct Current, or Decision Coverage
DC	Direct Current
DCDU	Data Link Control And Display Unit
DCN	Document Change Notice
DCP	Display Control Panel
DD	Dependence Diagram
DD	Digital Design
DDC	Digital Down Conversion
DDM	Difference in the Depth of Modulation
DDM	Difference in Depth of Modulation
DDP	Declaration of Design and Performance
DDR	Double Data Rate
DDS	Display Docking Station
DER	Designated Engineering Representative
DFMC	Dual Frequency Multiple Constellation
DG	Directional Gyroscope
DGPS	Differential Global Positioning System
DH	Decision Height
DIO	Discrete Input/Output
DISC	Discrete
DITS	Digital Information Transfer System
DL	Data Link
DLR	Data Link Recorder
DME	Distance Measuring Equipment
DMIR	Designated Manufacturing Inspection Representative
DNC	Direct Noise Canceling
DO	RTCA Document (“Document Order”)
DOD	Department Of Defense
DOID	Design Organisation Interface Document
DP	Departure Procedures
DRAM	Dynamic Random Access Memory
DRFS	Direct RF Sampling
DSP	Digital Signal Processor
DUAT	Direct User Access Terminal
DVE	Degraded Visual Environment
DVOR	Doppler VHF Omnidirectional Range
DWG	Drawing
EADI	Electronic Attitude Director Indicator
EASA	European Aviation Safety Agency
EATP	Equipment Acceptance Test Procedure
EATR	Equipment Acceptance Test Report
ECN	Engineering Change Notice
ECU	Engine Control Unit (=EEC)
EDD	Equipment Design Description
EDL	Equipment Development Laboratory
EEC	Electronic Engine Control
EEPROM	Electrically Erasable Programmable Read Only Memory
EFB	Electronic Flight Bag
EFD	Electronic Flight Display
EFIS	Electronic Flight Information System
EFIS	Electronic Flight Instrument System
EGPWS	Enhanced Ground Proximity Warning System
EGT	Exhaust Gas Temperature
EHS	Enhanced Surveillance
EHSI	Electronic Horizontal Situation Indicator
EIA	Electronics Industry Association
EICAS	Engine Indicating And Crew Alerting System
EIRD	Equipment Installation Requirement Document
EIRP	Equivalent Isotropically Radiated Power
ELT	Emergency Locator Transmitter
EMC	Electromagnetic Compatibility
EMCON	Emission Control
EMI	Electromagnetic Interference
EMS	Emergency Medical Service
ENC	Electronic Noise Canceling
ENG	Engine
ENR	Electronic Noise Reduction
EOC	Executable Object Code
EPR	Engine Pressure Ratio
EPROM	Erasable Programmable Read-Only Memory
ESD	Electrostatic Discharge
ETOP(S)	Extended-Range Twin-Engine Operation(S)
ETSO	European Technical Standard Order
EUROCAE	European Organization for Civil Aviation Equipment
EUT	Equipment Under Test
eVTOL	Electric Vertical Take-Off & Landing
EVTP	Equipment Verification Test Procedure
EVTR	Equipment Verification Test Report
FAA	Federal Aviation Administration
FADEC	Full Authority Digital Engine Control
FAI	First Article Inspection
FANS	Future Air Navigation System
FAR	Federal Aviation Regulation
FAS	Final Approach Segment
FBW	Fly-By-Wire
FC	Failure Condition
FCC	Failure Condition Classification
FCC	Flight Control Computer
FCR	Final Certification Review
FCS	Flight Control System
FD	Flight Director
FDAL	Function Development Assurance Level
FDE	Fault Detection And Exclusion
FDPS	Flight Plan Data Processing System
FDR	Flight Data Recorder
FDRS	Flight Data Recorder System
FDU	Flux Detector Unit
FE	Front-End
FF	Fuel Flow
FFR	First Flight Review
FFS	Functional Failure Set
FG	Flight Guidance
FHA	Functional Hazard Assessment
FHA	Functional Hazard Analysis
FIC	Flight Information Centre
FIFO	First In, First Out
FIS	Flight Information Service
FIS-B	Flight Information Services
FL	Flight Level
FLIR	Forward-Looking Infra-Red
FLTA	Forward Looking Terrain Awareness
FM	Formal Methods
FM	Frequency Modulation
FMA	Flight Mode Annunciator
FMEA	Failure Mode & Effects Analysis
FMECA	Failure Mode, Effects and Criticality Analysis
FMES	Failure Modes and Effects Summary
FMGS	Flight Management & Guidance System
FMS	Flight Management System
FOB	Fuel On-Board
FPA	Front Panel Assembly
FPE	Floating Point Emulation
FPGA	Field Programmable Gate Array
FPU	Floating Point Unit
FPU	Floating-Point Unit
FRACAS	Failure Reporting and Corrective Action System
FREQ	Frequency
FRS	Firmware Requirements Specification
FSS	Flight Service Station
FT	Functional Test
FTA	Fault Tree Analysis
FTP	File Transfer Protocol
FTP	Firmware Test Procedure
FW	Failure Warning
FW	Firmware
FWS	Flight Warning System
FYDS	Flight Director/ Yaw Damper System
G/A	Ground-to-Air
G/S	Glide Slope
GA	General Aviation
GA	Go Around
GAST	GBAS Approach Service Type
GB	Gigabyte
GBAS	Ground Based Augmentation System
GCAS	Ground Collision Avoidance System
GCU	Generator Control Unit
GDOP	Geometric Dilution Of Precision
GGS	Global Positioning System Ground Station
GHz	Gigahertz
GLNS	GPS Landing And Navigation System
GLNU	GPS Landing And Navigation Unit
GLONASS	Global Navigation Satellite System
GLS	GNSS Landing System
GLU	GPS Landing Unit
GMT	Greenwich Mean Time
GND	Ground
GNSS	Global Navigation Satellite System
GO	Go Around
GPIO	General Purpose Input/Output
GPS	Global Positioning System
GPWC	Ground Proximity Warning Computer
GPWS	Ground Proximity Warning System
GS	Glideslope
GS	Ground Speed or Ground Station
HAS	Hardware Accomplishment Summary
HAZ	Hazard or Hazardous
HBLP	Hardware Build and Load Control Procedure
HCDD	Hardware Conceptual Design Data
HCI	Hardware Configuration Index
HCM	Hardware Configuration Management
HCMP	Hardware Configuration Management Plan
HDDD	Hardware Detailed Design Data
HDG	Heading
HDG	SEL Heading Select
HDL	Hardware Design Language
HDL	Hardware Description Language
HDOP	Horizontal Dilution Of Precision
HDP	Hardware Development Plan
HDP	Hardware Design Plan
HDStd	Hardware Design Standards
HF	High Frequency
HHLD	Heading Hold
HIRF	High Intensity Radiated Field
HLR	High-Level Requirements
HMD	Helmet-Mounted Display
HMI	Human Machine Interface
HOL	High-Order Language
HPAP	Hardware Process Assurance Plan
HPR	High Pressure Rotor
HRD	Hardware Requirements Document
HRStd	Hardware Requirements Standards
HSD	High-Speed Data
HSI	Horizontal Situation Indicator
HSL	Heading Select
HTAWS	Helicopter Terrain Awareness and Warning System
HTP	Hardware Test Procedure
HTR	Hardware Test Results
HUD	Head-Up Display
HUMS	Health And Usage Monitoring Systems
HVVP	Hardware Validation & Verification Plan
HVVStd	Hardware Validation & Verification Standards
HW	Hardware
Hz	Hertz
I	Input
I/O	Input/Output
I2S	Inter-IC Sound
IA	Internal Audit
IAS	Indicated Airspeed
IBIT	Initiated Built-In Test
ICA	Instructions for Continued Airworthiness
ICAO	International Civil Aviation Organization
ICD	Interface Control Document
ICE	In-Circuit Emulator
ICNI	Integrated Communication, Navigation and Identification System
ICS	Internal Communication System
ID	Identify, Identification or Identifier
IDAL	Item Development Assurance Level
IDD	Interface Design Description
IDE	Integrated Development Environment
IDENT	Identify, Identifier, or Identification
IDS	Information Display System, or Integrated Display System
IFE	In-Flight Entertainment
IFF	Identification Friend Or Foe
IFICS	Integrated Flight Instrument And Control System
IFR	Instrument Flight Rules
IHA	Intrinsic Hazard Analysis
ILS	Instrument Landing System
ILS	Integrated Logistics Support
ILSP	Integrated Logistics Support Plan
IMA	Integrated Modular Avionics
IMC	Instrument Meteorological Conditions
IND	Indicator
INS	Inertial Navigation System
IOC	Initial Operational Capability
IP	Internet Protocol
IP	Intellectual Property
IPV	Instrument Procedure With Vertical Guidance (Renamed to APV)
IQ	In-phase/Quadrature
IRS	Inertial Reference System, or Interface Requirements Specification
ISA	International Standard Atmosphere
ISIS	Integrated Standby Instrument System
ISO	International Organization for Standardization
ISP	Integrated Switching Panel
ISR	Interrupt Service Routine
IT	Information Technologies
ITT	Interstage Turbine Temperature
ITU	International Telecommunication Union
IVSI	Instantaneous Vertical Speed Indicator
JAA	Joint Aviation Authorities
JASC	Joint Aircraft System/Component Code
JTAG	Joint Test Action Group
JTIDS	Joint Tactical Information Distribution System
KB	Kilobyte
kHz	Kilohertz
KIAS	Knots Indicated Airspeed
KT	Knot - Nautical Mile Per Hour
KTAS	Knots TRUE Airspeed
LAAS	Local Area Augmentation System
LADGPS	Local Area Differential GPS
LCD	Liquid Crystal Display
LDGPS	Local Area Differential Global Positioning Satellite
LED	Light-Emitting Diode
LF	Low Frequency
LLR	Low-Level Requirements
LMM	Locator Middle Marker
LO	Local Oscillator
LOA	Letter Of Agreement, or Letter Of Authorization
LOC	Localizer
LODA	Letter of Design Approval
LOI	Level of Involvement
LOM	Locator Outer Marker
LORAN	Long-Range Navigation
LPR	Low Pressure Rotor
LPV	Localizer Performance With Vertical Guidance
LRM	Line Replaceable Module
LRU	Line Replaceable Unit
LSB	Least Significant bit
LSP	Liskov Substitution Principle
LTE	Loss Of Tail Rotor Effectiveness Helicopters
LVDS	Low-Voltage Differential Signaling
M1553	MIL-STD-1553
MA	Markov Analysis
MAP	Manifold Absolute Pressure Or Missed Approach Point
MAPS	Minimum Aviation Performance Standards
MASPS	Minimum Aviation System Performance Standard
MB	Marker Beacon
MB	Megabyte
MBD	Model-Based Development
MC/DC	Modified Condition/Decision Coverage
MCBF	Mean Cycles Between Failures
MCDU	Multi-Purpose/Multi-Function Control And Display Unit
MCW	Modulated Continuous Wave
MDA	Minimum Decent Altitude
MEL	Minimum Equipment List
MF	Medium Frequency
MFD	Multi-Function Display
MFDS	Multi-Function Display System
MFR	Manufacturer
MIC	Microphone
MIDO	Manufacturing Inspection District Office
MIDS	Multifunctional Information Distribution System
MILSPEC	Military Specification
MilStd	Military Standard
MIO	Multiplexed I/O
MKP	Multi-Function Keypad
MKR	Marker Beacon
MLS	Microwave Landing System
MM	Middle Marker
MMD	Moving Map Display
MMEL	Master Minimum Equipment List
MMH	Mean Man-hours
MMR	Multi-Mode Receiver
MNPS	Minimum Navigation Performance Specifications
MntR	Maintainability Report
MOA	Military Operations Area
MoC	Means of Compliance
Mode	A Transponder Pulse-Code Reporting
Mode	C Transponder Code And Altitude Reporting
Mode	S Transponder Code, Altitude, And TCAS Reporting
MOPS	Minimum Operational Performance Standards
MOPS	Minimum Operational Performance Standard
MOSArt	Modular Open System Architecture
MPE	Minimum Processing Environment
MPS	Minimum Performance Standard
MRAM	Magnetoresistive Random Access Memory
MSA	Minimum Safe Altitude
MSB	Most Significant Bit
MSG	Message
MSG-3	Maintenance Steering Group-3
MSP	Modes S-Specific Protocol
MSSS	Mode S-Specific Services
MTBF	Mean Time Between Failures
MTBUR	Mean Time Between Unscheduled Removals
MTTF	Mean Time To Failure
MTTR	Mean Time to Repair
MVA	Minimum Vectoring Altitude
MVFR	Marginal Visual Flight Rules
NA	Not Applicable
NACO	National Aeronautical Charting Office
NAS	U.S. National Airspace System
NASA	National Aeronautics And Space Administration
NATO	North Atlantic Treaty Organization
NAV	Navigation Receiver
NAV	Navigation
NAVAID	Navigational Aid
NAVCOMM	Navigation And Communications Equipment Or Receiver
NAVSTARGPS	Navigation Satellite Timing And Ranging
NCATT	National Center For Aircraft Technician Training
NCD	No Computed Data
ND	Not Defined
ND	Navigation Display
NDB	Non-Directional Beacon
NFF	No Fault Found
NFPO	National Flight Procedures Office
NIMA	National Imagery And Mapping Agency
NM	or NMI Nautical Mile
NM	Nautical Mile(s)
NO	Normal Operation
NOAA	National Oceanic And Atmospheric Administration
NoTAM	Notice To Airmen
NPA	Non-Precision Approach
NPRM	Notice Of Proposed Rulemaking
NTAP	Notice To Airmen Publication
NTSB	National Transportation Safety Board
NVD	Night Vision Device
NVG	Night Vision Goggles
NVRAM	Non-Volatile Random-Access Memory
NWS	National Weather Service
O	Output
OAT	Outside Air Temperature
OBS	Omnibearing Selector
OCC	Operations Control Center
ODA	Organization Designation Authorization
OEM	Original Equipment Manufacturer
OM	Outer Marker
OMP	Obsolescence Management Plan
OOT	Object-Oriented Technology
OOTIA	Object Oriented Technology In Aviation
OPR	Open Problem Report
OS	Operating System
OWE/OEW	Operating Weight Empty/Operating Empty Weight
P	Parity
P-Code	GPS Precision Code
P-RNAV	Precision Area Navigation
PA	Process Assurance
PA	Public Address System
PAC	Process Asset Checklist
PAL	Pilot Activated Lighting
PAM	Power Amplifier Module
PAM	Pulse Amplitude Modulation
PAPI	Precision Approach Path Indicator
PAR	Precision Approach Radar
PASA	Preliminary Aircraft Safety Assessment
PBIT	Power-On BIT
PBIT	Powerup Built-In-Test
PBIT	Power-up Built-In Test
PC	Personal Computer
PCAP	Processor Configuration Access Port
PCB	Printed Circuit Board
PCL	Pilot Controlled Lighting
PCN	Product Change Notice
PD	Process Definition
PD	Profile Descent
PDI	Parameter Data Item
PDL	Product Development Leader
PDOP	Position Dilution Of Precision
PDR	Preliminary Design Review
PESA	Passive Electronically Scanned Array
PFD	Primary Flight Display Or Primary Flight Director
PFDE	Predicted Fault Detection And Exclusion
PHAC	Plan For Hardware Aspects Of Certification
PIDS	Prime Item Development Specification
PL	Programmable Logic
PLD	Programmable Logic Device
PLL	Phase Locked Loop
PMA	Parts Manufacturing Approval
PMG	Permanent Magnet Generator
PMP	Project Management Plan
PMU	Power Management Unit
PND	Primary Navigation Display
PNR	Passive Noise Reduction
POA	Production Organization Approval
POF	Phase Of Flight
POH	Pilot’s Operating Handbook
POS	Position
PPS	Pulse Pair Spacing
PR	Peer Review
PR	Problem Report (may also be “CR = Change Request”)
PRA	Pre-Recorded Announcement
PRA	Particular Risk Analysis
PRF	Pulse Repetition Frequency
PS	Processing System
PSAA	Plan for Software Aspects of Approval
PSAC	Plan for Software Aspects of Certification
PSCP	Project Specific Certification Plan
PSP	Partnership For Safety Plan
PSR	Primary Surveillance Radar
PSSA	Preliminary System Safety Assessment
PSSA	Preliminary Subsystem Safety Assessment
PSU	Passenger Service Unit
PTN	Problem Tracking Number
PTR	Program Trouble Report
PTS	Purchaser Technical Specification
PTT	Push-To-Talk
PU	Processor Unit
QA	Quality Assurance
QAR	Quick Access Recorder
QE	Quality Engineer
QEC	Quadrantal Error Correction
QM	Quality Management
QMP	Quality Management Plan
QMS	Quality Management System
QNH	Barometric Pressure Adjusted To Sea Level
QP	Qualification Plan
QPL	Qualified Product List
QRH	Quick Reference Handbook
QSPI	Quad Serial Peripheral Interface
QTP	Qualification Test Procedure
QTR	Qualification Test Report
R-NAV	Area Navigation
RA	Resolution Advisory (TCAS)
Rad	Alt Radio Altitude
RAI	Radio Altimeter Indicator
RAIM	Receiver-Autonomous Integrity Monitoring
RALT	Radar Or Radio Altimeter
RAM	Random-Access Memory
RAT	Ram Air Turbine
RCR	Reverse Current Relay
RCVR	Receiver
RDMI	Radio Distance Magnetic Indicator
RDP	Radar Data Processing System
RDR	Radar
RDU	Remote Display Unite
REC	Receive
REF	Reference
REIL	Runway End Identifier Lights
REL	Relative
RelR	Reliability Report
RF	Radio Frequency
RFCU	Radio Frequency Control Unit
RFI	Radio Frequency Interference
RHSM	Reduced Horizontal Separation Minimal
RISC	Reduced Instruction Set Computer
RJ	Regional Jet
RLG	Ring Laser Gyroscope
RLY	Relay
RMB	RNE Main Board
RMI	Radio Magnetic Indicator
RMP	Risk Management Plan
RNAV	Area Navigation
RNG	Range
RNP	Required Navigation Performance
ROC	Rate Of Climb
ROD	Rate Of Descent
ROM	Read-Only Memory
ROM	Read Only Memory
RPA	Remotely Piloted Aircraft (Unmanned Aerial Vehicle)
RPM	Revolutions Per Minute
RSP	Reversion Switch Panel
RSS	Root Sum Square
RT	Remote Terminal
RTCA	Radio Technical Commission for Aeronautics
RTE	Route
RTL	Run Time Library
RTOS	Real-Time Operating System
RVR	Runway Visual Range
RVSM	Reduced Vertical Separation Minimum
RX	Receiver
SAAR	Special Aircraft And Aircrew Requirements
SAE	Society Of Automotive Engineers
SAR	Search And Rescue, Smart ACMS Recorder
SAS	Software Accomplishment Summary
SAT	Static Air Temperature
SATCOM	Satellite Communication
SATNAV	Satellite Navigation
SBLI	Software Build and Load Instructions
SBLP	Software Build and Load Control Procedure
SC	System Control Category
SCA	Structural Coverage Analysis
SCA	Software Coverage Analysis
SCCB	Software Configuration Control Board
SCI	Software Configuration Index (or “Item”)
SCInd	Source Code Indices
SCM	Software Configuration Management
SCMP	Software Configuration Management Plan
SCR	Software Conformity Review
SCS	Software Coding Standard
SCStd	Software Code Standards
SCStd	Software Coding Standards
SD	Secure Digital
SDD	System Design Description
SDD	Software Design Description
SDDD	Software Design Description Document
SDF	Simplified Directional Facility
SDI	Source Destination Identifier
SDK	Software Development Kit
SDP	Software Development Plan
SDR	Software Defined Radio
SDRAM	Synchronous Dynamic Random-Access Memory
SDRL	Supplier Deliverables
SDS	Software Design Standard
SDStd	Software Design Standards
SECI	Software lifecycle Environment Configuration Index
SELCAL	Selective Calling
SEMP	System Engineering Management Plan
SES	Supplier Equipment Specification
SID	Standard Instrument Departure
SIRD	Software Interface Requirement Document
SIU	Satellite Interface Unit
SLA	Software Load Application
SLECI	Software Lifecycle Environment Configuration Index
SMA	Sub-Miniature Version A
SMP	Sub-Miniature Push-on
SMP	Supplier Management Plan
SMS	Short Messaging Service
SNR	Signal-To-Noise Ratio
SoC	System on a Chip
SOI	Stage of Involvement
SOP	Standard Operating Procedure
SOUP	Software of Unknown Pedigree (sometimes used with humor …)
SOW	Statement Of Work
SP	Safety Plan
SPI	Serial Peripheral Interface
SPL	Spare Parts List
SPP	Safety Program Plan
SPR	Software Planning Review
SQA	Software Quality Assurance
SQAP	Software Quality Assurance Plan
SQAR	Software Quality Assurance Representative
SRATS	System Requirements Allocated to Software
SRD	Software Requirements Data
SRD	Source Requirement Document
SRMT	Safety Reliability Maintainability Testability
SRMTP	Safety Reliability Maintainability Testability Plan
SRR	System Requirement Review
SRS	Software Requirement Specification
SRS	Speed Reference System
SRStd	Software Requirements Standards
SRU	Shop Replaceable Unit
SSA	System Safety Assessment
SSA	Subsystem Safety Assessment
SSCV/DR	Solid-State Cockpit Voice/Data Recorder
SSCVR	Solid-State Cockpit Voice Recorder
SSFDR	Solid-State Flight Data Recorder
SSM	Sign/Status Matrix
SSPP	System Safety Program Plan
SSR	Secondary Surveillance Radar
SSR	System Specification Review; alternatively: Software Specification Review
SSS	System Segment Specification
STAR	Standard Terminal Arrival Route
STARS	Standard Terminal Automation Replacement System
STC	Supplemental Type Certificate
STCA	Short-Term Conflict Alert
STP	Software Test Protocol
STP	Standard Temperature And Pressure
STP	Software Test Procedure
STR	Software Test Results
STS	Software Test Specification
SUA	Special Use Airspace
SVA	Software Validation Attestation
SVCP	Software Verification Cases and Procedures
SVP	Software Verification Plan
SVR	Software Verification Results
SW or S/W	Software
SW-IDD	Software Interface Design Description
SWCEH	Software and Complex Electronic Hardware
SYRD	System Requirements Document
T/R	Thrust Reverser Or Tail Rotor
T/R	Transmit/Receive
TA	Traffic Advisory
TACAN	Tactical Air Navigation System
Tach	Tachometer
TAD	Terrain Awareness Display
TAF	Terminal Area Forecast
TAS	Tool Accomplishment Summary
TAS	TRUE Airspeed or Tool Accomplishment Summary
TAT	TRUE Air Temperature, Or Total Air Temperature
TAWS	Terrain Awareness and Warning System
TBD	To Be Defined (or Determined; interchangeable)
TBO	Time Before Overhaul, Or Time Between Overhaul
TC	Test Case
TC	Type Certificate
TCA	Throttle Control Assembly, Or Terminal Control Area
TCAD	Traffic Collision Alert Device
TCAS	Traffic Collision Alert System
TCAS	Traffic Collision Avoidance System
TCF	Terrain Clearance Floor
TCI	Tool Configuration Index
TCN	TACAN
TCR	Test Completeness Review
TCU	TACAN Control Unit
TDOP	Time Dilution Of Precision
TDR	Transponder
TEMP	Test and Evaluation Master Plan
TEP	Test and Evaluation Plan
TERPS	Terminal En-Route Procedures
TFR	Temporary Flight Restrictions
TFT	Thin-Film Transistor
TGT	Turbine Gas Temperature, Or Target
THD	Total Harmonic Distortion
THD+N	Total Harmonic Distortion Plus Noise
THDG	TRUE Heading
TIA	Telecommunications Industry Association
TIS	Traffic Information Service
TK	Track Angle
TKE	Track-Angle Error
TLA	Thrust Lever Angle
TNC	Threaded Neill-Concelman
TNC	Threaded Neill–Concelman
TOD	Top Of Descent Point
TOR	Tool Operational Requirements
TQ	Tool Qualification
TQL	Tool Qualification Level
TQP	Tool Qualification Plan
TR or T/R	Transmitter Receiver Or Transceiver
TRACON	Terminal Radar Approach Control
TRANS	Transmit, Transmission, Or Transition
TRK	Track
TrnP	Training Plan
TRP	Mode S Transponder
TRR	Test Readiness Review
TRX	Transceiver
TSO	Technical Standard Orders
TstbR	Testability Report
TTL	Tuned To Localizer
TTL	Transistor-Transistor Logic
TTR	TCAS Ii Transmitter/Receiver
TTS	Time To Station
TVE	Total Vertical Error
TWDL	Two-Way Data Link, Or Terminal Weather Data Link
TWDR	Terminal Doppler Weather Radar
TWIP	Terminal Weather Information For Pilots
TWR	Terminal Weather Radar
TX	Transmit
UAM	Urban Air Mobility
UART	Universal Asynchronous Receiver Transmitter
UART	Universal Asynchronous Receiver-Transmitter
UAS	Unmanned Aerial System
UAV	Unmanned Aerial Vehicle
UHF	Ultra High Frequency
UHF	Ultra-High Frequency
ULB	Underwater Locator Beacon
UML	Unified Modified Language
USAF	United States Air Force
USB	Universal Serial Bus
USGS	United States Geological Survey
UTC	Universal Time Coordinate
UTRX	UHF Transceiver Module
UUT	Unit Under Test
V	Volts Or Voltage
V/L	VOR/Localizer
V/NAV	Vertical Navigation
V/R	Voltage Regulator
V/REF	Reference Velocity
V/S	Vertical Speed
V/TRK	Vertical Track
V&V	Validation and Verification
VAR	Variable
VASI	Visual Approach Slope Indicator
VASIS	Visual Approach Slope Indicator (System)
VDB	VHF Data Broadcast
VDF	VHF Direction Finding
VDL	VHF Data Link
VDR	VHF Digital Radio
VFO	Variable Frequency Oscillator
VFR	Visual Flight Rules
VG/DG	Vertical Gyroscope/Directional Gyroscope
VGA	Video Graphics Array
VHDL	VHSIC Hardware Description Language (VHSIC = Very High Speed Integrated Circuit)
VHF	Very High Frequency
VMC	Visual Meteorological Conditions
VNE	Never Exceed Speed
VNO	Maximum Structural Cruising Speed
VNR	VHF Navigation Receiver
VOR	VHF Omnidirectional Range
VOR/DME	VOR With Distance Measuring Equipment
VOR/MB	VOR Marker Beacon
VORILS	VHF Omnidirectional Range and Instrument Landing System
VORTAC	VOR And TACAN Combination
VOX	Voice Transmission
VPA	Vertical Path Approach
VPATH	Vertical Path
VRP	Visual Point Of Reference
VRX	VHF Receiver Module
VSG	Vector Signal Generator
VSI	Vertical Speed Indicator
VSM	Vertical Separation Limit
VSO	Stall Speed In Landing Configuration
VSWR	Voltage Standing Wave Ratio
VX	Speed For Best Angle Of Climb
VY	Speed For Best Rate Of Climb
WAAS	Wide Area Augmentation System
WBS	Work Breakdown Structure
WCET	Worst-Case Execution Time
WD	Wind Direction
WINDR	Wind Direction
WMA	WXR Waveguide Adapter
WMI	WXR Indicator Mount
WMS	Wide-Area Master Station
WMSC	Weather Message Switching Center
WMSCR	Weather Message Switching Center Replacement
WPT	Waypoint
WRT	WXR Receiver Transmitter
WS	Wind Shear
WX	Weather
WXR	Weather Radar System
WYPT	Waypoint
XADC	Xilinx Analog to Digital Converter
XCVR	Transceiver
XFR	Transfer
XMIT	Transmit
XMSN	Transmission
XMTR	Transmitter
XPDR	Transponder
XPDR	ATCRBS Transponder
XTAL	Crystal
XTK	Crosstrack
ZSA	Zonal Safety Analysis