The term TYPE OF GUITAR can refer to four different types of guitars: BASS, ACOUSTIC, electric, and SLIDE. A BASS guitar is a stringed instrument with four strings that is usually played with a pick or fingers. An ACOUSTIC guitar is a stringed instrument that produces sound acoustically without the need for electronic amplification. An electric guitar is a stringed instrument that uses pickups to convert the vibration of its strings into electrical signals. Finally, a SLIDE guitar is a type of guitar that is played by sliding a metal or glass bar along the strings.