The ukulele, sometimes abbreviated to uke, is a member of the guitar family of instruments which originated in Hawaii.  The ukulele was a Hawaiian interpretation of a machete which was introduced to Hawaiians by Portuguese immigrants in the late 19th century.  Ukuleles come in various sizes including soprano, concert, tenor and baritone.  Common tunings for ukuleles are C6 and D-tuning, however many other variations are frequently used.