This list contains acronyms, initialisms, and pseudo-blends that begin with the letter H.
For the purposes of this list:
- acronym = an abbreviation pronounced as a series of constituent letters, e.g., SARS = severe acute respiratory syndrome
- initialism = an abbreviation pronounced wholly or partly using the names of its constituent letters, e.g., CD = compact disc
- pseudo-blend = an abbreviation whose extra or omitted letters means that it cannot stand as a true acronym, initialism, or portmanteau (a word formed by combining two or more words).
- (a) = acronym in the example: SARS - (a) Severe acute respiratory syndrome
- (i) = initialism in the example: CD - (i) Compact disc
- (p) = pseudo-blend in the example: UNIFEM - (p) United Nations Development Fund for Women
- (s) = symbol (none of the above, representing and pronounced as something else; for example: MHz - Megahertz)
Add new entries here or in the sub-pages
Please add your own entries, in this page or in the appropriate sub-page. Use a quasi-dictionary order, with lowercase treated the same as uppercase and ignoring non-alphanumeric characters (hyphens and such). This means that only alphanumeric characters have any significance in determining order, and that lowercase letters occupy the same ordering position as uppercase (in tie-breaker cases, list lower case first). For example: Ka appears before KA. (This differs from a strict ASCII ordering.)
(Main list of acronyms and initialisms)
| Contents: | Top - H0–9 HA HB HC HD HE HF HG HH HI HJ HK HL HM HN HO HP HQ HR HS HT HU HV HW HX HY HZ |
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HA
- ha - (s) Hausa language (ISO 639-1 code) - Hectare
- HA - (s) Haiti (FIPS 10-4 country code) - (i) High Availability
- HAARP - (a) High-frequency Active Auroral Research Program
- HAART - (a) Highly Active Anti-Retroviral Therapy
- HADF - (a)High Alcohol Dependent Family
- HAI - (i) Human Awareness Institute
- HAL - (i) Hardware Abstraction Layer
- HALO - (a) High Altitude Low Opening (parachute jump)
- HALT - (a) Hungry Angry Lonely Tired
- HAM - (s) Amateur radio operator
- HANS - (a) Head And Neck Support (device used in many race cars)
- HARM - (a) High-speed Anti-Radiation Missile
- hat - (s) Haitian Creole language (ISO 639-2 code)
- HAT - (a) Happy Aloha Thursdays
- HAT - (i/a) Highest Astronomical Tide (nautical charts) - (a) Hungarian Automated Telescope
- hau - (s) Hausa language (ISO 639-2 code)
- HAW - (i) Heavy Antitank Weapon
- HAWK - (a) Homing All the Way Killer (air defence system)
- HAZ - (i) Heat-Affected Zone
- HAZMAT - (p) Hazardous Materials
HB
- HBCD - (p) HexaBromoCycloDodecane
- HBO - (i) Home Box Office
- HBR - (i) Human Behaviour Representation
- HBT - (i) Heterojunction Bipolar Transistor
- HBV - (i) Hepatitis B Virus
HC
- h.c. - (i) honoris causa (Latin, "for the sake of honour")
- HCCI - (i) Homogeneous Charge Compression Ignition
- HCF - (i) Highest Common Factor
- HCI - (i) Human-Computer Interaction/Interface
- HCSC - (i) Higher Command and Staff Course
- HCT - (i) Higher Colleges of Technology, tertiary education institution in the United Arab Emirates (UAE)
HD
- HD - (i) Henry Draper (star catalogue) - Hull-Down (armoured vehicle target, as opposed to Fully Exposed) - High Definition
- HDD - (i) Hard Disk Drive - High-Density Disk
- HDL - (i) High-Density Lipoprotein
- HDM - (i) Human Decision-Making
- HDRA - (i) Henry Doubleday Research Association
- HDTV - (p) High-Definition Television
HE
- he - (s) Hebrew language (ISO 639-1 code)
- He - (s) Helium
- HE - (a) High Explosive
- HEAT - (a) High Explosive Anti-Tank (ammunition)
- heb - (s) Hebrew language (ISO 639-2 code)
- HEER - (a) High-Explosive Extended Range (ammunition)
- HEIC - (i) Honourable East India Company
- HEMP - (a) High-Altitude Electromagnetic Pulse
- HEO - (a) Highly Elliptical Orbit
- HEOSS - (a) High Earth Orbit Space Surveillance
- HEP - (i) High-Explosive Plastic (ammunition)
- HEPA - (a/i) High-Efficiency Particulate Air (filter)
- her - (s) Herero language (ISO 639-2 code)
- HESH - (a) High-Explosive, Squash-Head (ammunition)
- HESV - (i) Heavy Engineering Support Vehicle
- HETT - (a) Heavy Equipment Transporting Truck / Heavy Equipment Truck Tractor
- HEU - (i) Highly Enriched Uranium
HF
- Hf - (s) Hafnium
- HF - (i) High Frequency
- HFAC - (p) Human Factors ("aytchfak")
- HFE - (i) Human Fertilisation and Embryology (UK Act)
- HFE - (s) The common-emitter current gain in a BJT transistor (also represented by βF). See: BJT
- HFEA - (i) Human Fertilisation and Embryology Authority (UK)
HG
- Hg - (i) Mercury (Latin Hydrargyrum)
- HGC - (i) UK Human Genetics Commission
- HGF - (i) Human Growth Factor
HH
- HHD - (p) humanitatum doctor (Latin, "doctor of humanities")
HI
- hi - (s) Hindi language (ISO 639-1 code)
- HI - (s) Hawaii (postal symbol)
- HIDACZ - (p) High-Density Airspace Control Zone ("high dak zed/zee")
- HIH - (i) His (or Her) Imperial Highness
- HIM - (i) His (or Her) Imperial Majesty
- HIMAD - (p) High to Medium Altitude Air Defence (see also H/MAD)
- HIMEZ - (a) High Altitude Missile Engagement Zone
- hin - (s) Hindi language (ISO 639-2 code)
- HIPAA - (i) U.S. Health Insurance Portability and Accountability Act
- Hipparcos - (p) HIgh Precision Parallax COllecting Satellite
- Hird - (a) Hurd of interfaces representing depth (cf. HURD)
- HiRISE - (p) High Resolution Imaging Science Experiment
- HIT - (a) Head Injection Technology
- HIV - (i) Human Immunodeficiency Virus
- HIWT - (i) Hobart Institute of Welding Technology
HJ
- HJ - (i) hic jacet (Latin, "here lies")
- HJD - (i) Heliocentric Julian Day
HK
- HK - (s) Hong Kong (ISO 3166 digram; FIPS 10-4 territory code)
- HKD - (s) Hong Kong dollar (ISO 4217 currency code)
- HKG - (s) Hong Kong (ISO 3166 trigram)
- HKS - (i) HyperKinetic Syndrome
HL
- hL - (s) Hectolitre
- HL - (i) Holding Line
- HLA - (i) High Level Architecture (simulation) - Human Leukocyte Antigen
- HLL - (i) High-Level Language
- HLS - (i) hoc loco situs (Latin, "laid in this place")
- HLVW - (i) Heavy Logistics Vehicle, Wheeled
HM
- HM - (s) Heard Island and McDonald Islands (ISO 3166 digram; FIPS 10-4 territory code)
- H/MAD - (p) High/Medium Altitude Air Defence ("aytchmad"; see also HIMAD)
- HMCE - (i) Her Majesty's Customs and Excise
- HMCS - (i) Her Majesty's Canadian Ship or Her Majesty's Courts Service
- HMD - (s) Heard and McDonald Islands (ISO 3166 trigram)
- HMF - (p) HydroxyMethyl Furfural
- HMM - (i) Hidden Markov model
- HMMWV - (i) High Mobility Multipurpose Wheeled Vehicle ("hum-vee"; "hummer")
- hmo - (s) Hiri Motu language (ISO 639-2 code)
- HMO - (i) Health Management Organization
- HMP - (i) Her Majesty's Prison
- HMS - (i) Helmet-mounted display - Her Majesty's Ship (Royal Navy)
- HMSO - (i) Her Majesty's Stationery Office
- HMV - (i) His Master's Voice
HN
- HN - (s) Honduras (ISO 3166 digram)
- HND - (s) Honduras (ISO 3166 trigram)
- HNL - (s) Honduran lempira (ISO 4217 currency code)
HO
- ho - (s) Hiri Motu language (ISO 639-1 code)
- Ho - (s) Holmium
- HO - (s) Honduras (FIPS 10-4 country code)
- HOLLAND - (a) Hope Our Love Lasts And Never Dies
- HOPI - (a) Hybrid Optical and Packet Infrastructure (see Internet2, Abilene Network)
- HoReCa - (a) Hotel, Restaurant and Catering
- HORIZON - (p) Hélicoptère d'observation radar et d'investigation sur zone (French, Zone Investigation and Radar Observation Helicopter)
- HOSTAC - (a) Helicopter Operations from Ships Other Than Aircraft Carriers
- HOT - (a) Highly Optimised Tolerance
- HOTAS - (a) Hands on throttle-and-stick
- HOTT or HotT - (i) Hordes of the Things (miniature fantasy wargaming rules; a play on The Lord of the Rings)
- HOV - (i) High Occupancy Vehicle
HP
- hp - (s) horse power
- HP - (i) Hewlett-Packard
- HPA - (i) UK Health Protection Agency
- HPGL or HP-GL - (i) Hewlett-Packard Graphics Language
- HP-IB - (i) Hewlett-Packard Instrument/Interface Bus (first implementation of GP-IB, later standardised and now known as IEEE-488)
- HP-IL - (i) Hewlett-Packard Interface Loop (serial bus used with some HP calculators and computers, notably the HP-41 and HP-71 series)
- HPLC - (i) High Performance Liquid Chromatography
- HPT - (i) High[er] Payoff Target
- HPV - (i) Human Papilloma Virus
HQ
- HQ - (i) HeadQuarters - (s) Howland Island (FIPS 10-4 territory code)
- HQDA - (i) HeadQuarters, Department of the Army
HR
- hr - (s) Croatian language (ISO 639-1 code)
- HR - (s) Croatia (FIPS 10-4 country code; ISO 3166 digram) - (i) Harvard Revised star catalogue - Human Resources
- HRBL - (i) High-level Representation of Behavior Language (original name of the Herbal language)
- HRD - (i) Human Resource Development
- HRED - (i) (U.S. Army Research Laboratory's) Human Research and Engineering Directorate (Aberdeen Proving Ground, MD)
- HRF - (i) High Readiness Forces
- HRH - (i) His (or Her) Royal Highness
- HRK - (s) Croatian kuna (ISO 4217 currency code)
- HRM - (i) His (or Her) Royal Majesty
- HRM - (i) Human Resource Management
- HRT - (i) Hormone Replacement Therapy
- hrv - (s) Croatian language (ISO 639-2 code)
- HRV - (s) Croatia (ISO 3166 trigram) - (i) High Resolution Visible
HS
- Hs - (s) Hassium
- HSBC - (i) Hongkong and Shanghai Banking Corporation
- HSC - (i) Higher School Certificate (as used in New South Wales)
- HSMAD - (i) Human Science/Modeling and Analysis Data
- HSPH - (i) Harvard School of Public Health
- HSS - (i) Health Service Support - (i) High-Speed Steel
- HSSI - (i) High-Speed Serial Interface
- HST - see entry
- HSV - (i) Herpes Simplex Virus - Hue Saturation Value (colour model)
HT
- ht - (s) Haitian Creole language (ISO 639-1 code)
- HT - (s) Haiti (ISO 3166 digram) - (i) High Temperature - hoc tempore (Latin, "at this time") - hoc titulo (Latin, "under this title")
- HTA - (i) HyperText Application
- HTFU - (a) Harden The Fuck Up
- HTG - (s) Haitian gourde (ISO 4217 currency code)
- HTH - (a) Hope That Helps
- HTI - (s) Haiti (ISO 3166 trigram)
- HTML - (i) HyperText Markup Language
- HTR - (i) Heated Towel Rail
- HTS - (i) High-Temperature Superconducting wire
- HTTP - (i) HyperText Transfer Protocol
HU
- hu- (s) Hungarian language (ISO 639-1 code)
- HU - (s) Hungary (ISO 3166 digram; FIPS 10-4 country code)
- HUD - (i/a) Head-Up Display - Housing and Urban Development
- HUF - (s) Hungarian forint (ISO 4217 currency code)
- HUHA - (a) Head up his/her ass (Marine salute; probably a backcronym)
- HUMINT - (p) Human Intelligence (military parlance)
- Hum-Vee - See HMMWV
- hun - (s) Hungarian language (ISO 639-2 code)
- HUN - (s) Hungary (ISO 3166 trigram)
- HURD - (a) Hird of Unix-Replacing Daemons (cf. Hird)
- HVU - (i) High Value Unit (military)
HV
- HV - (s) Upper Volta (ISO 3166 digram; obsolete 1984)
- HVAC - (s) Heating, Ventilation and Air Conditioning Used in architecture, business and marketing; refers to a building's entire system of heating, moving, or cooling air.
- HVAP - (i) High Velocity Armour Piercing (ammunition)
- HVHF - (i)High velocity human factors
- HVM - (i) High Velocity Missile
- HVO - (s) Upper Volta (ISO 3166 trigram; obsolete 1984)
- HVP - (i) HarborView Properties - High vacuum process - Hydrolyzed vegetable protein - Human Variome Project - High Velocity Protection - H.V.P. (rapper) - High Voltage Protection - High Vapor Pressure - Hub Voice Processor - High-Velocity Projectile - High-Video Pass - High-Velocity Particle
HW
HX
HY
- hy - (s) Armenian language (ISO 639-1 code)
- hye - (s) Armenian language (ISO 639-2 code)
HZ
- hz - (s) Herero language (ISO 639-1 code)
- Hz - (s) Hertz
- HZ - (s) Haze (METAR Code)
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