HN or Hn may refer to:
Arts and entertainment
*
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 o ...
(musical score notation: Hn.)
* HN, 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 ti ...
, e.g. HN211
*
Headline News
HLN is an American basic cable network. Owned by CNN Worldwide, the network primarily carries true-crime programming, recently drifting away from limited live news programming.
The channel was originally launched on January 1, 1982, by Tur ...
, former name of the HLN TV network
*
Hacker News
Hacker News (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 "anything that gratifies one' ...
, a social news website
Businesses and organizations
*
Equair (former IATA code: HN), a former Ecuadorian airline
*
HeavyLift Cargo Airlines
HeavyLift Cargo Airlines Pty Ltd is a cargo airline based in Los Angeles, United States. Founded in Sydney, Australia, it started operations in 2004 and operates scheduled and charter cargo services. HeavyLift took over passenger airline OzJet ...
(former IATA code: HN), a former Australian cargo airline
*
Hutchinson and Northern Railway (reporting mark: HN), Kansas, US
Places
*
Heilbronn
Heilbronn () is a List of cities and towns in Germany, city in northern Baden-Württemberg, Germany, surrounded by Heilbronn (district), Heilbronn District.
From the late Middle Ages on, it developed into an important trading centre. At the begi ...
(vehicle registration), a city in Germany
*
Herceg Novi
Herceg Novi (Cyrillic script, Cyrillic: Херцег Нови, ) is a town in Coastal Montenegro, Coastal region of Montenegro located at the Western entrance to the Bay of Kotor and at the foot of Mount Orjen. It is the administrative center of ...
(car plates: HN), a town in Montenegro
*
Honduras
Honduras, officially the Republic of Honduras, is a country in Central America. It is bordered to the west by Guatemala, to the southwest by El Salvador, to the southeast by Nicaragua, to the south by the Pacific Ocean at the Gulf of Fonseca, ...
(ISO 3166-1 country code)
*
Hunan
Hunan is an inland Provinces of China, province in Central China. Located in the middle reaches of the Yangtze watershed, it borders the Administrative divisions of China, province-level divisions of Hubei to the north, Jiangxi to the east, Gu ...
, a province of China
*
Thesprotia
Thesprotia (; , ) 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 region in antiquity.
His ...
(vehicle plate code: ΗΝ), regional unit of Greece
Science and technology
*
.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. It is bordered to the west by Guatemala, to the southwest by El Salvador, to the southe ...
, the Internet country code top-level domain (ccTLD) for Honduras
*
Harmonic number
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, \dot ...
, in mathematics
Other uses
* Hospitalman, a US Navy
hospital corpsman rate
*
, a two-letter combination used in some languages
**
Reduction of /hn/ to /n/ in Old/Middle English
See also
*
English horn
The cor anglais (, or original ; plural: ''cors anglais''), or English horn (mainly North America), is a double-reed woodwind instrument in the oboe family. It is approximately one and a half times the length of an oboe, making it essentially ...
(musical score notation: E. hn.)
*
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 ...
(musical score notation: S. hn.)
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