RSI LA 1 (la uno, formerly TSI 1) is one of two television channels produced by Radiotelevisione Svizzera di lingua Italiana for the Italian-speaking community of Switzerland. LA 1, which can be received in all parts of the country, is a generalist channel with a schedule encompassing news, entertainment, drama, cinema films, documentaries, and sport.

As well as being transmitted digitally throughout the Confederation, LA 1's programmes are also receivable on cable and encoded, via satellite. Until February 28, 2009, the station was called TSI 1, and before that (before TSI 2 went on air) RTSI. RSI LA1 has also been broadcast in HD since February 29, 2012.

• RSI La 1's fourth and previous logo used from 1999 to 28 February 2009.^[1]
• RSI La 1's fifth and current logo since 1 March 2009.
• First phase of RSI La 1's fifth and current logo used until 29 February 2012.
• HD logo since 1 March 2012.

• Televisione svizzera di lingua italiana
• List of Italian-language television channels