In 1964 fostered the born of the research center CSELT to modernize the Italian phone service, and in 1976 the campus of Scuola Superiore Guglielmo Reiss Romoli was built in L'Aquila to support training activities for managers and executives of the group.

In 1992, with the privatization carried out by first Amato government[1] is changed to be "STET - Società Finanziaria Telefonica S.p.A".

In 1993, STET's managing director Miro Allione left the company to create Stream, which became one of the largest pay TV and digital satellite television networks in Italy.

[2] In 1997 STET is merged with Telecom Italia, together with Telespazio and Italcable: the new company will be named Telecom Italia S.p.A., at the same time of the resignment of Ernesto Pascale, a STET's managing director and key person for the company.

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