(Main list of acronyms)
__NOTOC__ h – (s) Hecto H – (s) Henry – Hydrogen
HA ha – (s) Hausa language (ISO 639-1 code) – Hectare HA – (s) Haiti (FIPS 10-4 country code) – (i) High Availability HAC - (a) Home Access Center HAARP – (a) High Frequency Active Auroral Research Program HAART – (a) Highly Active Anti-Retroviral Therapy HAI – (i) Human Awareness Institute HAL – (i) Hardware Abstraction Layer HALO – (a) Habitation and Logistics Outpost (of the planned Lunar Gateway space station) High Altitude Low Opening (parachute jump) HALT (a) Highly Accelerated Life Test (a) Hungry Angry Lonely Tired HAMR – (a) Heat-assisted magnetic recording HAN - (s) IATA code for Noi Bai International Airport 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 – (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 HBCI – (i) Home Banking Computer Interface HBCU – (i) Historically black colleges and universities (U.S.) HBO – (i) Home Box Office HBR – (i) Harvard Business Review HBT – (i) Heterojunction Bipolar Transistor HBV – (i) Hepatitis B Virus
HC h.c. – (i) honoris causa (Latin, "for the sake of honor") HCAL — (p) Homogeneous calorimeter HCCI – (i) Homogeneous Charge Compression Ignition HCF – (i) Highest Common Factor HCI – (i) Human–Computer Interaction/Interface HCPCS – (i) Health Care Procedure Coding System 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 (armored vehicle target, as opposed to Fully Exposed) High Definition Huntington's Disease HDD (i) Hard Disk Drive High-Density Disk HDL – (i) High-Density Lipoprotein HDM – (i) Human Decision-Making HDMI – High-Definition Multimedia Interface HDR (i) Hard disk recorder Henningson, Durham & Richardson (founders of the engineering and construction firm now known by their initials) High dynamic range, a term used in both digital imaging and 3D rendering Hot Dry Rock (experimental geothermal technology) Human Development Report (UN publication) 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) HEBA – (p) Hellenic Basketball Clubs Association HEER – (a) High-Explosive Extended Range (ammunition) HEIC – (i) Honourable East India Company HELOC – (a) Home equity line of credit HEMP – (a) High-Altitude Electromagnetic Pulse HEO (a) High Earth orbit (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 HEV Hybrid Electric Vehicle (non-rechargeable) Hazadous EnVironment suit - outfit worn by Half-Life protagonist Gordon Freeman Hewitts – (a) Hills in England, Wales and Ireland over Two Thousand feet (with topographic prominence of at least 30 m)
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 HGTV – (i) Home & Garden Television
HH HHD – (p) humanitatum doctor (Latin, "doctor of humanities") HHB – Ha Ha Bonk – The noise made when you laugh your head off. Used instead of LOL... HHS – (i) (U.S. Department of) Health and Human Services
HI hi – (s) Hindi language (ISO 639-1 code) HI – (s) Hawaii (postal symbol) HIC – Hierarchical Ingredient Code, a system of classifying drug ingredients HIDACZ – (p) High-Density Airspace Control Zone ("high dak zed/zee") HIH – (i) His (or Her) Imperial Highness HIIT - (a) High-Intensity Interval Training HIM – (i) His (or Her) Imperial Majesty HIMAD – (p) High to Medium Altitude Air Defence (see also H/MAD) HIMARS - (a) HIgh Mobility Artillery Rocket System HIMEZ – (a) High Altitude Missile Engagement Zone HIMYM – How I Met Your Mother 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) Health Information 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) Hong Kong International Airport (IATA code) HKMAO – (i) Hong Kong and Macau Affairs Office HKO – (i) Hong Kong Observatory HKS – (i) HyperKinetic Syndrome HKSAR – (i) Hong Kong Special Administrative Region of the People's Republic of China
HL hL – (s) Hectolitre HL (i) Holding Line (i) Half-Life HLA – (i) High Level Architecture (simulation) – Human Leukocyte Antigen HLL – (i) High-Level Language HLN – (i) Headline News HLOS – (i) High Level Output Specification 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) (i) His Majesty / Her Majesty (title for certain monarchs) (i) Hatsune Miku H/MAD – (p) High/Medium Altitude Air Defence ("aytchmad"; see also HIMAD) HMCE – (i) Her/His Majesty's Customs and Excise (former UK government department; succeeded by HM Revenue and Customs) HMCS (i) Her/His Majesty's Canadian Ship Her Majesty's Courts Service (former UK agency; succeeded by Her Majesty's Courts and Tribunals Service) HMD (s) Heard and McDonald Islands (ISO 3166 trigram) (i) Helmet-Mounted Display HMF – (p) HydroxyMethyl Furfural HMICFRS - (i) His/Her Majesty's Inspectorate of Constabularies and of Fire and Rescue Services (UK Government agency) 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 maintenance organization HMO – (i) House in multiple occupation HMO – (i) Human milk oligosaccharide HMP – (i) Her Majesty's Prison HMRC – (i) Her/His Majesty's Revenue and Customs HMS - (i) Her/His Majesty's Ship (Royal Navy) HMSO – (i) Her Majesty's Stationery Office HMV – (i) His Master's Voice (disambiguation)
HN HN – (s) Honduras (ISO 3166 digram) HND (s) Honduras (ISO 3166 trigram) Tokyo Haneda Airport (IATA code) HNL (s) Honduran lempira (ISO 4217 currency code) Daniel K. Inouye International Airport (IATA 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 HOMES – the Great Lakes; Huron, Ontario, Michigan, Erie, Superior HONY – Humans of New York, a photoblog. 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 Hindustan Petroleum (s) Himachal Pradesh (Indian state code) HPA – (i) UK Health Protection Agency HPCL – (i) Hindustan Petroleum Corporation Limited HPGL or HP-GL – (i) Hewlett-Packard Graphics Language HPH - (s) IATA code for Cat Bi International Airport 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 HPMOR – (i) Harry Potter and the Methods of Rationality (work of Harry Potter fan fiction) HPT – (i) High[er] Payoff Target HPV – (i) Human Papilloma Virus
HQ HQ – (i) Headquarters (s) Howland Island (FIPS 10-4 territory code) HQ – (i) High Quality 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 – from the country's native name of Hrvatska) (s) Haryana (Indian state code) (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, Maryland) 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 HSA – A health savings account available to taxpayers in the United States. HSBC – (i) The Hong Kong and Shanghai Banking Corporation HSC (i) Higher School Certificate (i) Helicopter Sea Combat, a type of U.S Navy aviation squadron HSM – (i) High School Musical HSMAD – (i) Human Science/Modeling and Analysis Data HSN – (i) Home Shopping Network 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 HTC High Tech Computer Corporation, original name of the company now known simply as HTC HTFU – (a) Harden The F**k 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 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) HUI - (s) IATA code for Hue's Phu Bai International Airport HUMINT – (p) Human Intelligence (military parlance) Hum-Vee – See HMMWV hun – (s) Hungarian language (ISO 639-2 code) HUN – (s) Hungary (ISO 3166 trigram)