CSELT
| Formerly | Centro Studi e Laboratori S.p.A. (1961-1964) Centro Studi e Laboratori Telecomunicazioni S.p.A. (1964-2001) | 
|---|---|
| Company type | Subsidiary | 
| Industry | Telecommunications | 
| Founded | 1961 | 
| Founder | STIPEL | 
| Headquarters | , Italy | 
| Area served | Worldwide | 
| Key people | Luigi Bonavoglia Basilio Catania Cesare Mossotto | 
| 150k Euro (2000) | |
| Owner | IRI-STET (until the 1990s), Telecom Italia (since the 1990s) | 
| Number of employees | 1200 (in 2000) | 
| Parent | IRI | 
| Divisions | Voice Technologies, Media Technologies, Fiber Optics Technologies | 
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.
It played a major role internationally especially in the standardization of protocols and technologies in telecommunication: perhaps the most widely well known is the standardization of mp3.
CSELT has been active from 1964 to 2001, initially as a part of the IRI-STET group, the major conglomerate of Italian public Industries in the 1960s and 1970s; it later became part of Telecom Italia Group. In 2001 was renamed Telecom Italia Lab as part of Telecom Italia Group.