The Libretto (Italian for "booklet") is a line of subnotebook computers that was designed and produced by Toshiba.

The original Libretto line was discontinued in Europe and the U.S. in 1999, but the production continued in Japan with the SS, FF and then the L series until 2002.

The first L series Libretto, larger than the previous range, was released on 18 May 2001 and the last on 24 April 2002.

The first Libretto models, the L20 & L30 used 486 processors from Advanced Micro Devices (AMD) and were only available in Japan (although the L30 was also assembled and marketed in South Korea under the Comos Brand name).

Like the majority of Librettos models produced, the L series were not officially available outside Japan.