HN or Hn may refer to:
Arts and entertainment
* Hn., musical score notation for
French horn
* A numbering system for
Royal Doulton Figurines, 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
HLN is an American basic cable network. Owned by Warner Bros. Discovery, the network primarily carries true crime programming.
The channel was originally launched on January 1, 1982 by Turner Broadcasting as CNN2 (later renamed Headline News ...
*
Hacker News
Places
*
Heilbronn
Heilbronn () is a List of cities and towns in Germany, city in northern Baden-Württemberg, Germany, surrounded by Heilbronn (district), Heilbronn District. With over 126,000 residents, it is the sixth-largest city in the state.
From the late Mid ...
, Germany, vehicle registration
*
Herceg Novi, a town in Montenegro
*
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 Salvador, to the southeast by Nicaragua, to the south by the Pacific Oce ...
(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, a province of China
*
Thesprotia, regional unit of Greece (vehicle plate code ⟨ΗΝ⟩, for capital Igoumenitsa )
Other uses
* Hospitalman, a United States Navy
Hospital corpsman 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
The cor anglais (, or original ; plural: ''cors anglais''), or English horn in 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 an alto ...
, "E. hn." in music scores
*
Saxhorn, "S. hn." in music scores
{{disambiguation
