Generally speaking, one can divide theological reference tools into three broad categories.
- Systematic Theologies - Seek to present theological material systematically according to specific categories that frame the discussion, e.g., the nature of God, the work of the Spirit, the essence of sin, etc.
- Biblical Theologies - Seek to present theological material according to categories more directly related to those of the Biblical authors, books, and corpuses; seek to give special attention to the progressive unfolding of this theological material across Biblical history and the Biblical canon.
- Historical Theologies - Seek to present developmnent of Christian theology throughout church history and spanning various theological traditions. Some are organized according to historical period while others are organized topically.