Chord Bible is the generic name given to a variety of musical theory publications featuring a large number of chord diagrams for fretted stringed instruments. The subject matter applies exclusively to chordophones, stringed musical instruments capable of playing more than one note at a time. Members belonging to the chordophone family include the guitar, banjo, mandolin, ukulele, charango, balalaika, bajo sexto and many other stringed instruments. With the chord bible, the format only tends to apply to fretted or keyboard instruments where a clear diagram can be illustrated to show the musician where to place his or her fingers on the fingerboard or keyboard. Allied publications will alternatively be labelled chord dictionaries or chord encyclopaedias, but are essentially laid out in a similar way, albeit in a sometimes truncated format. Source: Wikipedia (en)