II is the Roman numeral for 2. II may also refer to:

Biology and medicine

* Image intensifier, medical imaging equipment *

Invariant chain HLA class II histocompatibility antigen gamma chain also known as HLA-DR antigens-associated invariant chain or CD74 (Cluster of Differentiation 74), is a protein that in humans is encoded by the ''CD74'' gene. The invariant chain (Abbreviated Ii ...

, a polypeptide involved in the formation and transport of MHC class II protein *

Optic nerve In neuroanatomy, the optic nerve, also known as the second cranial nerve, cranial nerve II, or simply CN II, is a paired cranial nerve that transmits visual information from the retina to the brain. In humans, the optic nerve is derived fro ...

, the second cranial nerve

Economics

Income inequality There are wide varieties of economic inequality, most notably income inequality measured using the distribution of income (the amount of money people are paid) and wealth inequality measured using the distribution of wealth (the amount of we ...

, or the wealth gap, in economics *

Internationalization Index Internationalization Index is a criterion used by the United Nations to rank nations and companies in evaluating their degree of integration with the world economy. Internationalization Index is calculated as the number of foreign affiliates divi ...

, used by the UN to rank nations and companies in evaluating their degree of integration with the world economy * ''Institutional Investor'' (magazine), an American finance magazine

Music

Supertonic In music, the supertonic is the second degree () of a diatonic scale, one whole step above the tonic. In the movable do solfège system, the supertonic note is sung as ''re''. The triad built on the supertonic note is called the supertonic ch ...

, in music * ''ii'', a 2018 song by CHVRCHES

Albums

* ''II'' (2 Unlimited album), 1998 * ''II'' (Aquilo album), 2018 * ''II'' (Bad Books album), 2012 * ''II'' (Boyz II Men album), 1994 * ''II'' (Capital Kings album), 2015 * ''II'' (Charade album), 2004 * ''II'' (The Common Linnets album), 2015 * ''II'' (Compact Disco album), 2011 * ''II'' (Cursed album), 2005 * ''II'' (Darna album), 2003 * ''II'' (Espers album), 2006 * ''II'' (Fuzz album), 2015 * ''II'' (Hardline album), 2002 * ''II'' (High Rise album), 1986 * ''II'' (Khun Narin album), 2016 * ''II'' (Kingston Wall album), 1993 * ''II'' (The Kinleys album), 2000 * ''II'' (Kurious album), 2009 * ''II'' (Last in Line album), 2019 * ''II'' (Lords of Black album), 2016 * ''II'' (Maylene and the Sons of Disaster album), 2007 * ''II'' (METZ album), 2015 * ''II'' (Moderat album), 2013 * ''II'' (The Presidents of the United States of America album), 1996 * ''II'' (Sahg album), 2008 * ''II'' (Seven Thorns album), 2013 * ''II'' (Unknown Mortal Orchestra album), 2013 * ''II'' (Xerath album), 2011 *''II'', by Krux, 2006 *''II'', by Majical Cloudz, 2011 *''II'', by Viva Brother, 2017 *''II'', an EP by

TNGHT TNGHT is a musical duo consisting of Scottish producer Hudson Mohawke and Canadian producer Lunice, formed in 2011. The duo released their self-titled debut EP to positive reviews in 2012. They announced an indefinite hiatus in late 2013, unti ...

, 2019 *''

Crystal Castles II ''Crystal Castles II'' is the second studio album by Canadian electronic music duo Crystal Castles, released on May 24, 2010 by Fiction Records and Last Gang Records. The album was initially scheduled for release on June 7, 2010; however, the rele ...

'', 2010 *''

Led Zeppelin II ''Led Zeppelin II'' is the second studio album by the English rock band Led Zeppelin, released on 22 October 1969 in the United States and on 31 October 1969 in the United Kingdom by Atlantic Records. Recording sessions for the album took place ...

'', 1969 *''

Meat Puppets II ''Meat Puppets II'' is the second album by the Phoenix, Arizona band the Meat Puppets, released in 1984. It is a departure from their self-titled debut album, which consisted largely of noisy hardcore with unintelligible vocals. It covers many gen ...

'', 1984 *'' Soul Assassins II'', 2000 *''

Viva Koenji! ''弐(II)'', also known as ''Viva Koenji!'' and ''2 (ni)'' is the second studio album by the band Kōenji Hyakkei. Track listing # "Grembo Zavia" – (10:14) # "Graddinoba Revoss" – (4:28) # "Sllina Vezom" – (5:28) # "Quidom" &n ...

'', Koenji Hyakkei album, also known as ''弐(II)'' *''Iris II'', by

Iris Iris most often refers to: *Iris (anatomy), part of the eye *Iris (mythology), a Greek goddess * ''Iris'' (plant), a genus of flowering plants * Iris (color), an ambiguous color term Iris or IRIS may also refer to: Arts and media Fictional ent ...

, 1987

People and social groups

* ''Ii'' is a Japanese surname, daimyō of Hikone: **

Ii clan is a Japanese clan which originates in Tōtōmi Province. It was a retainer clan of the Imagawa family, and then switched sides to the Matsudaira clan of Mikawa Province at the reign of Ii Naotora. A famed 16th-century clan member, Ii Naom ...

, Japanese clan (Sengoku period) **

Ii Naomasa was a general under the Sengoku period ''daimyō'', and later ''shōgun'', Tokugawa Ieyasu.Ii Naotora Ii Naotora (井伊直虎, d. 12 September 1582) was a daimyō of the Sengoku period. She was the daughter and only child of Ii Naomori, the eighteenth head of their clan. She was primarily the head of Ii clan and retainer of the Imagawa clan, beca ...

, female daimyō and foster mother of Naomasa **

Ii Naoyuki is a noted Japanese author and professor of creative writing at Tokai University's Shonan campus. Biography A native of Nobeoka, Miyazaki, Ii graduated in 1978 from Keio University with a degree in history (archaeology and ethnology). His first n ...

, a Japanese author *

John Papa ʻĪʻī John (Ioane) Kaneiakama Papa ʻĪʻī (1800–1870) was a 19th-century educator, politician and historian in the Kingdom of Hawaii. Life ʻĪʻī was born 1800, in the month of Hilinehu, which he calculated to be August 3, in later life. He was b ...

, a Hawaiian noble

Other uses

* ii (digraph), a digraph in certain romanized alphabets *

ii (IRC client) IRC It, or ii is a free and open-source Unix IRC client written in C by the suckless.org community. From the readme: ii is a minimalist FIFO and filesystem-based IRC client. It creates an irc directory tree with server, channel and nickname ...

, short for IRC It, an Internet Relay Chat client for Unix-like operating systems *

Ii, Finland Ii (; sv, Ijo) is a municipality of Finland. It is situated by the Bothnian Bay, at the mouth of river Iijoki, and it is part of the Northern Ostrobothnia region. The municipality has a population of () and covers an area of of which is wat ...

, a municipality of Finland * Illegal immigrant (especially in Hong Kong vernacular) *

Index Islamicus Index Islamicus (, ) is a bibliography database of publications about Islam and the Muslim world, first compiled in 1956 by James Douglas Pearson. It is compiled by C.H. Bleaney & S. Sinclair and the School of Oriental and African Studies, London, ...

, a bibliography database of publications about Islam and the Muslim world *

Internet Infidels Internet Infidels, Inc. is a Colorado Springs, Colorado-based nonprofit educational organization founded in 1995 by Jeffery Jay Lowder and Brett Lemoine. Its mission is to use the Internet to promote a view that supernatural forces or entities do n ...

, a discussion forum *

IBC Airways IBC Airways is an FAR Part 135 on-demand airline headquartered in unincorporated Broward County, Florida, near Fort Lauderdale. IBC Airways operates on-demand cargo services to the Caribbean. Its main bases are Miami International Airport (MIA) a ...

(IATA code: II) *

Yi language Nuosu or Nosu (, transcribed as ), also known as Northern Yi, Liangshan Yi, and Sichuan Yi, is the prestige language of the Yi people; it has been chosen by the Chinese government as the standard Yi language () and, as such, is the only one tau ...

(ISO 639-1: ii) {{disambiguation