'Janus' may refer to:
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Janus (mythology), the two-faced god of gates, doors, doorways, beginnings, and endings in Roman mythology
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Janus (moon), a moon of Saturn
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Janus Patera, a shallow volcanic crater on Io, a moon of Jupiter
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Janus (simulation), a military combat simulation first developed in the late 1970s by the Lawrence Livermore National Laboratory's Combat Simulation Laboratory
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Society of Janus, a San Francisco based BDSM education and support group
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Janus Capital Group, an investment company based in Denver, Colorado
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Zündapp Janus, a bubble car model by Zündapp
★ a Janus word, or
auto-antonym: a word with two opposite meanings
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Janus (TV series), A television series created by the Australian Broadcasting Commission with two story lines: the criminal family being prosecuted and the police/judicial process
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Schempp-Hirth Janus, a two-seater glider
'People':
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Janus of Cyprus, king of Cyprus from 1398 to 1432
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Janusz I, Archbishop of Gniezno
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Janus I, Duke of Masovia
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Janus II, Duke of Masovia
★ Janus Junius Toland, a sobriquet of pantheist philosopher
John Toland
★ Janus Ulitius, the latinized name of 17th century philologist
Jan van Vliet
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Janus Friis, the Danish entrepreneur best known for co-founding the file-sharing application KaZaA and Skype, the peer-to-peer telephony application
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Janus (Paul Kelly), an English professional wrestler
In 'computing':
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Janus (programming language)
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Windows 3.1 (codenamed Janus)
★ ''Janus'' was the pre-release codename for
Windows 2000 64-bit editions for
Alpha and
Itanium
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Janus (DRM), a Digital Rights Management platform of Microsoft
In 'music' and 'film':
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Janus Films, an American film distribution company
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Janus Records, a record label
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Janus (band), an orchestral darkwave group
★ Janus, the criminal organization in the James Bond movie ''
GoldenEye''
★ The Janus Project, a taboo cloning project in the movie ''
Judge Dredd''
In 'literature' and 'comics':
★ , a book by
Arthur Koestler
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Janus (comics), a superhero in the
DC Comics universe
★ The
Janus Directive, a DC Comics crossover
★ ''Janus'', another comic book superhero, from the
Marvel Comics universe and an enemy of
Dracula
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Janus (Stargate), an
Ancient scientist in the TV series ''
Stargate Atlantis'' and ''
Stargate SG-1''
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Janus (Angels and Demons), the antagonist in the novel ''Angels and Demons''
★ ''Janus'', a French poetry magazine published in Paris by Elliott Stein from 1950 to 1961
In 'games':
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Janus Zeal, a character in the game ''Chrono Trigger''
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Janus chess, a chess variant
In 'geography':
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Janus Island, in the Palmer Archipelago of Antarctica
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Janus Lake (Ontario), in Ontario, Canada
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Janus Lake (Washington), in Snohomish County, Washington
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Mont Janus, in France
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Mount Janus (Antarctica), in Antarctica
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Mount Janus (Newfoundland), in Newfoundland and Labrador, Canada
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Mount Janus (Svalbard), in Svalbard, Norway.
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Janus Peak, in British Columbia, Canada
In 'Scientific Literature':
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Janus-faced molecule, A molecule that has an effect either positive or negative depending on the situation.