Presbyterians are members of a Christian denomination that follows the teachings of John Calvin, a key figure in the Protestant Reformation. They emphasize the authority of the Bible and the importance of faith in Jesus Christ. The church is governed by a system of elders, which is where the name "Presbyterian" comes from the Greek word for elder. Worship services in Presbyterian churches often include prayer, singing hymns, and preaching. The denomination is known for its commitment to social justice and community service, reflecting its belief in living out faith through action. Presbyterians are part of a larger tradition of Reformed Christianity.