These congregations share historical roots with other, similarly named congregations within the Restoration Movement, including congregations organized within formal fellowships, such as the "Christian Church (Disciples of Christ)" or the "Churches of Christ". The congregations discussed in this article, however, have chosen to remain fully autonomous. Further distinguishing these congregations is their use of instrumental music within their worship, unlike the "Churches of Christ" who do not use instrumental music. The instrumental congregations discussed here and the "a cappella" "Churches of Christ" are otherwise very similar but have little contact with each other in most communities, although there is some cooperation among some larger churches and also in some educational institutions.