The term Open String (ópən strɪ́ŋ) refers to any string that is played without pressing it to against the fret. The open strings are tuned E(6), A(5), D(4), G(3), B(2), e(1), from low to high. Open string chords refers to the basic chords on a guitar, and are usually the first chords a new guitar player learns. These chords are very simple; C Major, D major, D7, B7, G Major, G7, A Major, A7, A Minor, D Minor, C7, E Major, E Minor, and E7. They are called the open chords because they utilize open strings, and are a combination of open and fretted strings.