| 項目 |
| H |
| H 形鋼［H-shaped steel］ |
| H 株 |
| H 氏賞 |
| H ビーム［H beam］ |
| H-1 ロケット［H-1 launch vehicle］ |
| H-2 ロケット［H-2 launch vehicle］ |
| h |
| HA1［Hawaiian Airlines］ |
| HA2［hepatitis A］ |
| HA3［(和) home＋automation］ |
| ha［hectare］ |
| HABITAT（ハビタ）［habitation］ |
| HACCP（ハセップ）［hazard analysis and critical control point of evaluation］ |
| HAI［Republic of Haiti］ |
| HAIR［highway advisory information radio］ |
| HAM［Hamburg］ |
| HAMAS（ハマース）［(アラビア)Harakat al-muqaqama al-islamiyya］ |
| hANP［human atrial natriuretic polypeptide］ |
| HATS［Promotion Committee of the Harmonization of Advanced Telecommunication Systems］ |
| HB1［halfback］ |
| HB2［hard and black］ |
| HB3［hepatitis B］ |
| HB4［home banking］ |
| HB 法［horizontal Bridgeman method］ |
| HBC［health and beauty care］ |
| HBO 療法［hyperbaric oxygen therapy］ |
| H-bomb［hydrogen bomb］ |
| HBS1［Harvard Business School］ |
| HBS2［home bus system］ |
| HBV［hepatitis B virus］ |
| HC［hydrocarbon］ |
| HCFC［hydrochlorofluorocarbons］ |
| HCH［hexachlorocyclohexane］ |
| HD［hemodialysis］ |
| HDCG［high definition computer graphics］ |
| HDD［hard disk drive］ |
| HDI［Human Development Index］ |
| HDL［high-density lipoprotein］ |
| HDLC［high-level data link control procedure］ |
| HDPE［high-density polyethylene］ |
| HDTV［high-definition television］ |
| HDW, hdw［hardware］ |
| HE1［home electronics］ |
| HE2［human engineering］ |
| He［helium］ |
| HEAO［High-Energy Astronomy Observatory］ |
| HEIB（ヒーブ）［home economist in business］ |
| HEL1［helicopter］ |
| HEL2［Helsinki］ |
| HELP［House in Emergency of Love and Peace］ |
| HEMT（ヘムト）［high electron mobility transistor］ |
| HEPA フィルター［high-efficiency particulate air filter］ |
| HF［high frequency］ |
| Hf［hafnium］ |
| HFC［hydrofluorocarbon］ |
| HFSP［human frontier science program］ |
| Hg［(ラ) Hydrargyrum］ |
| HGF［hepatocyte growth factor］ |
| HGH［human growth hormone］ |
| HID ランプ［high-intensity discharge lamps］ |
| hi-fi［high fidelity］ |
| HIJ［Hiroshima］ |
| HIV［human immunodeficiency virus］ |
| HK［Hong Kong］ |
| HKD［Hong Kong Dollar］ |
| HKG［Hong Kong］ |
| HKMA［Hong Kong Monetary Authority］ |
| HKT［Phuket］ |
| HLA 抗原［human leukocyte antigen］ |
| .hlp［help］ |
| HMD［head mounted display］ |
| HMR［home-meal replacement］ |
| HN［Republic of Honduras］ |
| HND［Haneda］ |
| HNL［Honolulu］ |
| HNPCC［hereditary nonpolyposis colorectal cancer］ |
| HNS［host nation support］ |
| Ho［holmium］ |
| HON［Republic of Honduras］ |
| HOPE（ホープ）［H-2 orbiting plane］ |
| HP1［home page］ |
| HP2［horsepower］ |
| HP シェル［hyperbolic shell］ |
| hPa［hectopascal］ |
| HPAES［high performing Asian economies］ |
| HPCC 計画［High Performance Computing and Communications］ |
| HPLC［high-performance liquid chromatography］ |
| HQ, hq.［headquarters］ |
| .hqx |
| HR1［House of Representatives］ |
| HR2［human relations］ |
| HR3［Republic of Croatia］ |
| HR 図［Hertzsprung-Russel Diagram］ |
| hr.［hour］ |
| HRAF（フラフ）［Human Relations Area Files］ |
| HRT［hormone replacement therapy］ |
| HS［Harmonized Commodity Description and Coding System］ |
| HSP［heat shock protein］ |
| HSST［high speed surface transport］ |
| HST［Hubble space telescope］ |
| HT［Republic of Haiti］ |
| HTLV［human T-cell leukemia virus］ |
| .htm［hyper text markup language］ |
| HTML［hyper text markup language］ |
| .html［hyper text markup language］ |
| http［hyper text transfer protocol］ |
| HU［Republic of Hungary］ |
| HUAC［House Un-American Activities Committee］ |
| HUD［Department of Housing and Urban Development］ |
| HUGO（ヒューゴ）［Human Genome Organization］ |
| HUMINT（ヒューミント）［human intelligence］ |
| HUN［Republic of Hungary］ |
| HUS［hemolytic ureic syndrome］ |
| HV［hybrid vehicle］ |
| HVG 反応［host-versus-graft reaction］ |
| HVJ［hemagglutinating virus of Japan］ |
| HW［hardware］ |
| HWR［heavy water reactor］ |
| HYFLEX［Hypersonic Flight Experiment］ |
| Hz［(ド) Hertz］ |