ITK may stand for:
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ITK (gene), a mammalian gene encoding IL2-inducible T-cell kinase
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Itk, ( IncrTk), a programming language
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Innovation TK Ltd
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Insight Segmentation and Registration Toolkit, an extensible open source image software library
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Kalimantan Institute of Technology (''Institut Teknologi Kalimantan''), a university in Balikpapan, Indonesia
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Inuit Tapiriit Kanatami, a Canadian organisation representing Inuit
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