Olt or OLT may refer to:
People:
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Károly Olt (1904–1985), Hungarian politician
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Mike Olt (born 1988), American baseball player
Places:
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Olt County, a county (județ) of Romania
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Olt (river), a river in Romania
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Olt Defile, a defile that has been cut into the Transyvanian Alps in south-central Romania by the river Olt
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Lot (river), a river in France, formerly called the Olt
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Olton railway station, England (National Rail code: OLT)
In science and technology:
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OLT (mobile network), a former manual mobile telephone network in Norway
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Optical line termination, a piece of telecommunications equipment used for fiber-optic communications
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Orthotopic liver transplant, in medicine
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Overwhelmingly Large Telescope, a proposed optical telescope
Other uses:
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Orangutan Land Trust, a UK charity working for the long-term survival of the orangutan
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OLT, 1969 novel by Kenneth Gangemi
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OLT Express Germany, a German airline
