People tend to label groups to differentiate themselves according to their believes:

• Trinitarian: 1 God exists as 3 distinct persons, namely: the Father, the Son and the Holy Spirit.
• Unitarian: 1 God exist as 1 person, namely: the Father

Doctrines are not listed by correctness or popularity, but by alphabetical order

Please note that this article is still a work in progress and may contain errors.