String instruments are musical instruments that produce sound from vibrating strings. In most strings instruments, the vibrations are transmitted to the body of the instrument, which also vibrate, along the air inside it. In the Hornbostel-Sachs scheme of musical instrument classification, used in organology, they are called chordophones. Some common instruments in the string family are guitar, sitar, rabab, electric bass, violin, viola, cello, double bass, banjo, mandolin, ukulele, bouzouki, and harp.
Early string instruments have been excavated in ancient Mesopotamia, like the lyres of Ur, which date to 2500 BC.