Optical data processing (2,694)
Oulun yliopisto (2,438)
Operating systems (Computers) (1,845)
Oulun kaupunginteatteri (1,700)
Organizational change (1,214)
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Open source software (593)
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OECD (449)
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Oulun kaupunki (437)
Object-oriented programming (Computer science) (421)
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Oulun seudun ammattikorkeakoulu (393)
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Officials and employees (324)
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Obama, Barack (168)
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