HN or Hn may refer to:
Arts and entertainment
* Hn., musical score notation for
French horn
The French horn (since the 1930s known simply as the horn in professional music circles) is a brass instrument made of tubing wrapped into a coil with a flared bell. The double horn in F/B (technically a variety of German horn) is the horn most ...
* A numbering system for
Royal Doulton Figurines
This is a list of list of Royal Doulton figurines in ascending order by HN number. HN is named after Harry Nixon (1886–1955), head of the Royal Doulton painting department who joined Doulton in 1900. This list includes the HN number, the ...
, e..g. HN211
Businesses and organizations
*
Heavylift Cargo Airlines
HeavyLift Cargo Airlines Pty Ltd was an Australian cargo airline headquartered now in Los Angeles, United States. It started operations in 2004 and operates scheduled and charter cargo services. HeavyLift took over passenger airline OzJet in 2 ...
(IATA airline designator)
*
Hutchinson and Northern Railway
The V&S Railway is a shortline railroad that operates two disconnected lines in the U.S. state of Kansas. It is affiliated with A&K Railroad Materials. The company acquired its first line, a former Atchison, Topeka and Santa Fe Railway line betw ...
, Kansas, US, reporting mark
Media
* HN, former alternate name for
Headline News
*
Hacker News
Hacker News (sometimes abbreviated as HN) is a social news website focusing on computer science and entrepreneurship. It is run by the investment fund and startup incubator Y Combinator. In general, content that can be submitted is defined as "any ...
Places
*
Heilbronn, Germany, vehicle registration
*
Herceg Novi
Herceg Novi ( cyrl, Херцег Нови, ) is a coastal town in Montenegro located at the Western entrance to the Bay of Kotor and at the foot of Mount Orjen. It is the administrative center of the Herceg Novi Municipality with around 33,000 ...
, a town in Montenegro
*
Honduras (ISO 3166-1 country code)
**
.hn
.hn is the Internet country code top-level domain (ccTLD) for Honduras
Honduras, officially the Republic of Honduras, is a country in Central America. The republic of Honduras is bordered to the west by Guatemala, to the southwest by El ...
, the Internet country code top-level domain (ccTLD) for Honduras
*
Hunan
Hunan (, ; ) is a landlocked province of the People's Republic of China, part of the South Central China region. Located in the middle reaches of the Yangtze watershed, it borders the province-level divisions of Hubei to the north, Jiangxi ...
, a province of China
*
Thesprotia
Thesprotia (; el, Θεσπρωτία, ) is one of the regional units of Greece. It is part of the Epirus region. Its capital and largest town is Igoumenitsa. Thesprotia is named after the Thesprotians, an ancient Greek tribe that inhabited the ...
, regional unit of Greece (vehicle plate code ⟨ΗΝ⟩, for capital Igoumenitsa )
Other uses
* Hospitalman, a United States Navy
Hospital corpsman
A hospital corpsman (HM r corpsman is an enlisted medical specialist of the United States Navy, who may also serve in a U.S. Marine Corps unit. The corresponding rating within the United States Coast Guard is health services technician (HS ...
rate
*
, a two-letter combination used in some languages
**
Reduction of /hn/ to /n/ in Old/Middle English
*
Harmonic numbers
In mathematics, the -th harmonic number is the sum of the reciprocals of the first natural numbers:
H_n= 1+\frac+\frac+\cdots+\frac =\sum_^n \frac.
Starting from , the sequence of harmonic numbers begins:
1, \frac, \frac, \frac, \frac, \do ...
See also
*
English horn, "E. hn." in music scores
*
Saxhorn
The saxhorn is a family of valved brass instruments that have conical bores and deep cup-shaped mouthpieces. The saxhorn family was developed by Adolphe Sax, who is also known for creating the saxophone family. The sound of the saxhorn has a ...
, "S. hn." in music scores
{{disambiguation
