Telecom Italia Lab S.p.A. (formerly Centro Studi e Laboratori Telecomunicazioni S.p.A.; CSELT) is an Italian research center for telecommunication based in Torino, the biggest in Italy and one of the most important in Europe.

CSELT became internationally known at the end of 1960s thanks to a cooperation with the US-based company COMSAT for a pilot project of TDMA (and PCM) satellite communication system.

[2] In 1971, CSELT built the "Gruppi Speciali",[3] a time-division processing computer for telephone call switching.

A second result from Tamburelli was the electronic removal from the image of what was term "blood" covering the man of the Shroud.

[7] Since 1975 the group of Voice Technology, led by Giulio Modena, carried on the advanced researchers in the field, publishing for Springer (together with the consortium of Esprit project) the book in 1990: Pirani, Giancarlo, ed.

In 1996 (with Telecom Italia Mobile) the first GSM pre-paid card in the world was released,[10][11] and in 1999 the first UMTS call in a European city was tested.