Answer:
1.Catholicism 2.Orthodoxy3.Protestantism(Lutherans,Baptist,Methodist,more)4.Nontrinitarian
However, most do not consider those who are not believers in the Blessed Trinity (Unitarians, Jehovah Witnesses, Mormons, etc.) to be true Christians as they reject the Nicene and Apostles Creeds which are the basis of beliefs of all Christians.