The SDT Electronics is present in Portugal for 40 years. It was created in 1978 as a subsidiary of the French group Thomson-CSF, ensuring that for 10 years a large part of its activities were conducted under the aegis of the Thomson Group. In 1988, Thomson-CSF France sold the company to a financial group, SDT Gestion et Investissement, giving rise to the name that remains current, SDT Electrónica.

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