List of acronyms: H

• h – Hecto
• H – Henry – Hydrogen

HA

• ha – Hausa language – Hectare
• HA – Haiti – High Availability
• HAARP – High Frequency Active Auroral Research Program
• HAART – Highly Active Anti-Retroviral Therapy
• HAI – Human Awareness Institute
• HAL – Hardware Abstraction Layer
• HALO –
• * Habitation and Logistics Outpost
• * High Altitude Low Opening
• HALT
• * Highly Accelerated Life Test
• * Hungry Angry Lonely Tired
• HAMR – Heat-assisted magnetic recording
• HAN - IATA code for Noi Bai International Airport
• HANS – Head And Neck Support
• HARM – High-speed Anti-Radiation Missile
• hat – Haitian Creole language
• HAT – Highest Astronomical Tide – Hungarian Automated Telescope
• hau – Hausa language
• HAW – Heavy Antitank Weapon
• HAWK – Homing All the Way Killer
• HAZ – Heat-Affected Zone
• HAZMAT – Hazardous Materials

HB

• HBCD – HexaBromoCycloDodecane
• HBCI – Home Banking Computer Interface
• HBCU – Historically black colleges and universities
• HBO – Home Box Office
• HBR – Harvard Business Review
• HBT – Heterojunction Bipolar Transistor
• HBV – Hepatitis B Virus

HC

• h.c. – honoris causa
• HCAL — Homogeneous calorimeter
• HCCI – Homogeneous Charge Compression Ignition
• HCF – Highest Common Factor
• HCI – Human–Computer Interaction/Interface
• HCPCS – Health Care Procedure Coding System
• HCSC – Higher Command and Staff Course
• HCT – Higher Colleges of Technology, tertiary education institution in the United Arab Emirates

HD

• HD
• * Henry Draper (star catalogue)
• * Hull-Down
• * High Definition
• * Huntington's Disease
• HDD
• * Hard Disk Drive
• * High-Density Disk
• HDL – High-Density Lipoprotein
• HDM – Human Decision-Making
• HDMI – High-Definition Multimedia Interface
• HDR
• * Hard disk recorder
• * Henningson, Durham & Richardson
• * High dynamic range, a term used in both digital imaging and 3D rendering
• * Hot Dry Rock
• * Human Development Report
• HDRA – Henry Doubleday Research Association
• HDTV – High-definition television

HE

• he – Hebrew language
• He – Helium
• HE – High Explosive
• HEAT – High-Explosive Anti-Tank
• heb – Hebrew language
• HEBA – Hellenic Basketball Clubs Association
• HEER – High-Explosive Extended Range
• HEIC – Honourable East India Company
• HELOC – Home equity line of credit
• HEMP – High-Altitude Electromagnetic Pulse
• HEO
• * High Earth orbit
• * Highly elliptical orbit
• HEOSS – High Earth Orbit Space Surveillance
• HEP – High-Explosive Plastic
• HEPA – High-Efficiency Particulate Air
• her – Herero language
• HESH – High-Explosive, Squash-Head
• HESV – Heavy Engineering Support Vehicle
• HETT – Heavy Equipment Transporting Truck / Heavy Equipment Truck Tractor
• HEU – Highly Enriched Uranium
• HEV
• * Hybrid Electric Vehicle
• * Hazadous EnVironment suit - outfit worn by Half-Life protagonist Gordon Freeman
• Hewitts – Hills in England, Wales and Ireland over Two Thousand feet

HF

• Hf – Hafnium
• HF – High Frequency
• HFAC – Human Factors
• HFE – Human Fertilisation and Embryology
• HFE – The common-emitter current gain in a BJT transistor. See: BJT
• HFEA – Human Fertilisation and Embryology Authority

HG

• Hg – Mercury
• HGC – UK Human Genetics Commission
• HGF – Human Growth Factor
• HGTV – Home & Garden Television

HH

• HHD – humanitatum doctor
• HHB – Ha Ha Bonk – The noise made when you laugh your head off. Used instead of LOL...
• HHS – (U.S. Department of) Health and Human Services

HI

• hi – Hindi language
• HI – Hawaii
• HIC – Hierarchical Ingredient Code, a system of classifying drug ingredients
• HIDACZ – High-Density Airspace Control Zone
• HIH – His (or Her) Imperial Highness
• HIIT - High-Intensity Interval Training
• HIM – His (or Her) Imperial Majesty
• HIMAD – High to Medium Altitude Air Defence
• HIMARS - HIgh Mobility Artillery Rocket System
• HIMEZ – High Altitude Missile Engagement Zone
• HIMYM – How I Met Your Mother
• hin – Hindi language
• HIPAA – U.S. Health Insurance Portability and Accountability Act
• Hipparcos – HIgh Precision Parallax COllecting Satellite
• Hird – Hurd of interfaces representing depth
• HiRISE – High Resolution Imaging Science Experiment
• HIT – Health Information Technology
• HIV – Human Immunodeficiency Virus
• HIWT –

HJ

• HJ – hic jacet
• HJD – Heliocentric Julian Day

HK

• HK – Hong Kong
• HKD – Hong Kong dollar
• HKG –
• * Hong Kong
• * Hong Kong International Airport
• HKMAO – Hong Kong and Macau Affairs Office
• HKO – Hong Kong Observatory
• HKS – HyperKinetic Syndrome
• HKSAR – Hong Kong Special Administrative Region of the People's Republic of China

HL

• hL – Hectolitre
• HL
• * Holding Line
• * Half-Life
• HLA – High Level Architecture (simulation) – Human Leukocyte Antigen
• HLL – High-Level Language
• HLN – Headline News
• HLOS – High Level Output Specification
• HLS – hoc loco situs
• HLVW – Heavy Logistics Vehicle, Wheeled

HM

• HM
• * Heard Island and McDonald Islands
• * His Majesty / Her Majesty
• * Hatsune Miku
• H/MAD – High/Medium Altitude Air Defence
• HMCE – Her/His Majesty's Customs and Excise
• HMCS
• * Her/His Majesty's Canadian Ship
• * Her Majesty's Courts Service
• HMD
• * Heard and McDonald Islands
• * Helmet-Mounted Display
• HMF – HydroxyMethyl Furfural
• HMICFRS - His/Her Majesty's Inspectorate of Constabularies and of Fire and Rescue Services
• HMM – Hidden Markov model
• HMMWV – High Mobility Multipurpose Wheeled Vehicle
• hmo – Hiri Motu language
• HMO – Health maintenance organization
• HMO – House in multiple occupation
• HMO – Human milk oligosaccharide
• HMP – Her Majesty's Prison
• HMRC – Her/His Majesty's Revenue and Customs
• HMS - Her/His Majesty's Ship
• HMSO – Her Majesty's Stationery Office
• HMV – His Master's Voice (disambiguation)

HN

• HN – Honduras
• HND
• * Honduras
• * Tokyo Haneda Airport
• HNL
• * Honduran lempira
• * Daniel K. Inouye International Airport

HO

• ho – Hiri Motu language
• Ho – Holmium
• HO – Honduras
• HOLLAND – Hope Our Love Lasts And Never Dies
• HOMES – the Great Lakes; Huron, Ontario, Michigan, Erie, Superior
• HONY – Humans of New York, a photoblog.
• HOPI – Hybrid Optical and Packet Infrastructure
• HoReCa – Hotel, Restaurant and Catering
• HORIZON – Hélicoptère d'observation radar et d'investigation sur zone
• HOSTAC – Helicopter Operations from Ships Other Than Aircraft Carriers
• HOT – Highly Optimised Tolerance
• HOTAS – Hands on throttle-and-stick
• HOTT or HotT – Hordes of the Things
• HOV – High Occupancy Vehicle

HP

• hp – horse power
• HP –
• * Hewlett-Packard
• *Hindustan Petroleum
• * Himachal Pradesh
• HPA – UK Health Protection Agency
• HPCL – Hindustan Petroleum Corporation Limited
• HPGL or HP-GL – Hewlett-Packard Graphics Language
• HPH - IATA code for Cat Bi International Airport
• HP-IB – Hewlett-Packard Instrument/Interface Bus
• HP-IL – Hewlett-Packard Interface Loop
• HPLC – High Performance Liquid Chromatography
• HPMOR – Harry Potter and the Methods of Rationality
• HPT – High Payoff Target
• HPV – Human Papilloma Virus

HQ

• HQ –
• * Headquarters
• * Howland Island
• HQ – High Quality
• HQDA – Headquarters, Department of the Army

HR

• hr – Croatian language
• HR
• * Croatia
• * Haryana
• * Harvard Revised star catalogue
• * Human Resources
• HRBL – High-level Representation of Behavior Language
• HRD – Human Resource Development
• HRED – Human Research and Engineering Directorate
• HRF – High Readiness Forces
• HRH – His Royal Highness
• HRK – Croatian kuna
• HRM – His (or Her) Royal Majesty
• HRM – Human Resource Management
• HRT – Hormone Replacement Therapy
• hrv – Croatian language
• HRV
• * Croatia
• * High Resolution Visible

HS

• Hs – Hassium
• HSA – A health savings account available to taxpayers in the United States.
• HSBC – The Hong Kong and Shanghai Banking Corporation
• HSC
• * Higher School Certificate
• * Helicopter Sea Combat, a type of U.S Navy aviation squadron
• HSM – High School Musical
• HSMAD – Human Science/Modeling and Analysis Data
• HSN – Home Shopping Network
• HSPH – Harvard School of Public Health
• HSS
• * Health Service Support
• * High-Speed Steel
• HSSI – High-Speed Serial Interface
• HST – see entry
• HSV
• * Herpes Simplex Virus
• * Hue Saturation Value

HT

• ht – Haitian Creole language
• HT
• * Haiti
• * High Temperature
• * hoc tempore
• * hoc titulo
• HTA – HyperText Application
• HTC
• * High Tech Computer Corporation, original name of the company now known simply as HTC
• HTFU – Harden The F**k Up
• HTG – Haitian gourde
• HTH – Hope That Helps
• HTI – Haiti
• HTML – HyperText Markup Language
• HTS – High-Temperature Superconducting wire
• HTTP – HyperText Transfer Protocol

HU

• hu- Hungarian language
• HU – Hungary
• HUD – Head-Up Display –
• HUF – Hungarian forint
• HUHA – Head up his/her ass
• HUI - IATA code for Hue's Phu Bai International Airport
• HUMINT – Human Intelligence
• Hum-Vee – See HMMWV
• hun – Hungarian language
• HUN – Hungary
• HURD – Hird of Unix-Replacing Daemons
• HVU – High Value Unit

HV

• HV – Upper Volta
• HVAC – 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 – High Velocity Armour Piercing
• HVHF – High velocity human factors
• HVI - High Value Individual
• HVM – High Velocity Missile
• HVO – Upper Volta
• HVP –
• *
• * High vacuum process
• * Hydrolyzed vegetable protein
• *
• *
• * High Voltage Protection
• * High Vapor Pressure
• * High-Velocity Projectile
• * High-Video Pass
• * High-Velocity Particle
• * Hub Voice Processor
• * Human Variome Project
• HVT - High-Value Target

HW

• HW – Hardware – High Water
• HWM – Hardware morphing

HX

• HX –
• * IATA code of Hong Kong Airlines
• * Medical history
• * Hydrogen halide
• * Concept automobile by HUMMER
• HXB – The glycoprotein Tenascian C

HY

• hy – Armenian language
• hye – Armenian language
• HYP
• * Halkın Yükselişi Partisi, a political party in Turkey
• * Harvard, Yale, Princeton
• HYS – Harvard, Yale, Stanford

HZ

• hz – Herero language
• Hz – Hertz
• HZ – Haze