The libretto U105 contains the control of a standard-sized notebook wrapped into a pioneering 2.1 lb. mini-notebook model. While small in size, it is big on higher aspects. The libretto U105, the smallest and lightest notebook from Toshiba, is also at the head of security technology with a fingerprint reader that helps promise the secure of your information. At almost half the size of standard notebooks, the completely useful libretto U105 is ideal for busy travelers and others on the go.