Avionics Magazine presents the third edition of our comprehensive Aerospace Acronym Guide. Since we started compiling the list in 2002, the number of acronyms and abbreviations has grown by 660 entries, from 2,306 to 2,966.
Though it is not an exhaustive list, we trust it will serve you well.
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HAA high-altitude airship
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HAD hardware architecture document
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HADS high-altitude platform station
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HALE high-altitude, long-endurance
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HARS high altitude route system
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HCI human-computer interface
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HCP heads-up control panel
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HCS host computer system
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HDD head-down displays
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HDG heading
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HDG SEL heading select
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HDISK hard disk
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HDL hybrid data link
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HDLC high-level data link control
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HDLC-B HDLC-balanced
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HDLMS hybrid data link management system
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HDOP horizontal dilution of precision
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HDP hardware development plan
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HDTV high-definition television
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HE altitude error
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HEA head equipment assembly
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HERF high-energy radio frequency (or energy radiated fields: dense)
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HF high frequency
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HF human factors
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HFACS human factors analysis and classification system
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HFDL high frequency data link
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HFDM high-frequency data modem
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HFDR high frequency data radio
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HFI human factors integration
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HFNPDU high frequency network protocol data unit
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HFS high frequency system
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HFSG human factor study group
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HFSNL high frequency subnetwork layer
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HFWG human factors working group
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HGA high gain antenna
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HGAS HGA system
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HGC head-up guidance computer
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HGS head-up guidance system
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HGS HFDL ground station
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HHLD heading hold
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HID host interface display
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HIL horizontal integrity limit
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HIRF high intensity radiated field
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HST-900 high speed transceiver
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HLCS high lift control system
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HLE higher layer entity
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HLL high level language
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HMD helmet-mounted display
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HMI hazardously misleading information
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HMI human-machine interface
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HMOS high density metal oxide semiconductor
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HMU height monitoring unit
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HO handoff
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HOCSR host/oceanic computer system replacement
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HOTAS hands on throttle and stick
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HOW hand-over word
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HP high pressure
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HP holding pattern
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hPa hecto Pascal
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HPA high power amplifier
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HPC high pressure compressor
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HPR high power relay
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HPSOV high pressure shutoff valve
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HPT high pressure turbine
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HRD home routing domain
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HRM home regional manager
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HSD high-speed data
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HS-DSAD high speed frame relay service access device
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HIS horizontal situation indicator
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HSIT hardware and software integration test
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HSL heading select
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HSR high stability reference
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HSRP hot standby routing protocol
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HTC highest two-way channel
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HUD head up display
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HUMS health and usage monitoring system
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HVPS high voltage power supply
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HWCI hardware configuration item
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HX heat exchanger
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HYD hydraulic
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HYDIM HYD interface module
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Hz Hertz (cycles per second)
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