| Harvard Mark I |
Harvard Revised Photometry |
Harvard–Smithsonian Center for Astrophysics |
harvesting |
harvest Moon |
| Harvey, William |
Hasan, Muhammad Abdille Sayyid (1864–1920) |
Hasdrubal (207) |
Hashed Message Authentication Code |
hash function |
| hashing |
hashing algorithm |
hashish |
hash P complete |
hash search |
| hash sign |
hash table |
hashtag |
hash total |
hash value |
| Hasidism |
Haskell |
Hasse diagram |
Hassell, Odd |
hassium |
| Hastarian |
hastelloy |
Hastings, Battle of (14 October 1066) |
hastingsite |
Hastings, Warren (1732–1818) |
| Hastings, Wilfred. Keith (1930–2016) |
hatch |
Hatchett, Charles |
Hatch-Slack pathway |
Hat Creek Radio Observatory |
| hatha-yoga |
Hathor |
Hatley–Pirbhai |
hat matrix |
Hatshepsut (1540–c.1481) |
| Hauck, Frederick Hamilton (1941– ) |
Haughey, Charles (1925–2006) |
Hauksbee, Francis |
Haumurian |
Hauptman, Herb Aaron |
| Hauptsatz |
Hausa |
Hausdorff dimension |
Hausdorff, Felix (1868–1942) |
Hausdorff space |
| Hausman test |
haustorium |
Haute-Provence Observatory |
Hauterivian |
Havel, Václav (1936–2011) |
| Haversian canals |
Hawaiian-Emperor chain |
Hawaiian eruption |
hawaiite |
hawala |
| Hawera |
hawfinch |
hawk |
Hawker |
Hawke, Robert James Lee (1929–) |
| Hawking process |
Hawking radiation |
Hawking, Stephen William |
Hawking, Stephen William (1942–2018) |
Hawkins, Sir John (1532–95) |
| Hawkins, Sir Richard (1560–1622) |
Hawley, Steven Alan (1951– ) |
Haworth projection |
Haworth, Sir (Walter) Norman |
hawthorn |
| Hawthorne effect |
Hayabusa |
Hayabusa 2 |
Haya de la Torre, Victor Raúl (1895–1979) |
Hayashi track |
| Hay bridge |
Hayek, Friedrich (1899–1992) |
Hayes command set |
Hayes-compatible |
Hayes, Rutherford Birchard (1822–93) |
| Haymarket Square riot (1886) |
Haynes–Shockley experiment |
Hays, James Douglas |
Haystack Observatory |
Hay Treaties (1901) |
| HAZAN |
hazard |
hazard analysis |
hazard and operability study |
hazardous energy |
| hazard rate |
hazard ratio |
hazchem code |
haze |
hazel |
| HAZID |
HAZOP |
Haüy, Abbé René-Just (1743–1822) |
haüyne |
Haüy, René Just |
| HB |
HbbTV |
H-bend |
HBT |
hcf |
| HCFC |
HCG |
HCI |
h.c.p. |
HD |
| HD Catalogue |
HDCD |
HDD |
HD DVD |
HDL |
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