Is Unitarianism and Unitarian Universalism the same thing?

There is also a branch of Christianity that does not believe in the Trinity (TRI = three); this group is called Unitarians (UNI = one). They believe that Jesus was a man that had the one God, the Father, within him bringing the world back to himself (God the Father). To this Unitarian group the Holy Spirit is part of the Father, so is not a separate part of something, like the Trinity.