This list is intended for those musicians whose primary instrument throughout their careers has been or is now the acoustic guitar. Artists with vocal accompaniment were considered & included with the main focus on instrumental abilities which included, originality, innovation, technique & influence within this genre. It does Not include the Pioneer's of Blues, Jazz, Classical, or the Latin acoustic based genre's such as Flamenco, or those Modern guitarists who recorded or performed their music in an occasional 'unplugged' setting. As with all lists, this list is a subjective list and makes no claim of an official nature.