| Acronym | Meaning |
 | HOTT OR HOTT | Hordes Of The Things (miniature Fantasy Wargaming Rules; A Play On The Lord Of The Rings) |
| HOV | High Occupancy Vehicle |
| HP | IB -Hewlett-Packard Instrument/Interface Bus (first Implementation Of GP-IB |
| HP | IL -Hewlett-Packard Interface Loop (serial Bus Used With Some HP Calculators And Computers |
| HP | Hewlett-Packard |
| HP | Horse Power |
| HPA | UK Health Protection Agency |
| HPGL OR HP | GL -Hewlett-Packard Graphics Language |
| HPLC | High Performance Liquid Chromatography |
| HPT | High[er] Payoff Target |
| HPV | Human Papilloma Virus |
| HQ | HeadQuarters -Howland Island (FIPS 10-4 Territory Code) |
| HQDA | HeadQuarters |
| HR | Croatia (FIPS 10-4 Country Code; ISO 3166 Digram) -Harvard Revised Star Catalogue - Human Resources |
| HR | Croatian Language (ISO 639-1 Code) |
| HRBL | High-level Representation Of Behavior Language (original Name Of The Herbal Language) |
| HRD | Human Resource Development |
| HRED | (U.S. Army Research Laboratory's) Human Research And Engineering Directorate (Aberdeen Proving Ground |
| HRF | High Readiness Forces |
| HRH | His (or Her) Royal Highness |
| HRK | [[Croatian Kuna (ISO 4217 Currency Code) |
| HRM | His (or Her) Royal Majesty |
| HRM | Human Resource Management |
| HRT | Hormone Replacement Therapy |
| HRV | Croatia (ISO 3166 Trigram) -High Resolution Visible |
| HRV | Croatian Language (ISO 639-2 Code) |
| HS | Hassium |
| HSBC | Hongkong And Shanghai Banking Corporation |
| HSC | High School Certificate (as Used In New South Wales) |
| HSMAD | Human Science/Modeling And Analysis Data |
| 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 (colour Model) |
| HT | Haiti (ISO 3166 Digram) -High Temperature - Hoc Tempore (Latin |
| HT | Haitian Creole Language (ISO 639-1 Code) |
| HTA | HyperText Application |
| HTG | Haitian Gourde (ISO 4217 Currency Code) |
| HTI | Haiti (ISO 3166 Trigram) |
| HTML | HyperText Markup Language |
| HTS | High-Temperature Superconducting Wire |
| HTTP | HyperText Transfer Protocol |
| HU | Hungarian Language (ISO 639-1 Code) |
| HU | Hungary (ISO 3166 Digram; FIPS 10-4 Country Code) |
| HUD | Head-Up Display - Housing And Urban Development |
| HUF | Hungarian Forint (ISO 4217 Currency Code) |
| HUHA | Head Up His/her Ass (Marine Salute; Probably A Backcronym) |
| HUM | Vee - See HMMWV |
| HUMINT | Human Intelligence (military Parlance) |
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