- REL 000: Belonging to the Subject; not further Classified
- REL 001: Science of Religion, Theology, in General
- REL 100: Science of Religion
- REL 120: Religious Phenomenology
- REL 140: Myths; Mythology; Theories of Creation; Cosmogony; Anthropogony
- REL 150: Cult; Religious Life; Religious Organisation
- REL 160: Comparison of Religions; Religious Theology
- REL 199: Other (Psychology of Religion, ...)
- REL 200: History of Religions; Religions of Mankind
- REL 210: Prehistoric Religions; Natural Religions
- REL 230: Ancient European Religions
- REL 310: Jewry
- REL 330: Islam
- REL 350: Buddhism
- REL 360: Religion in Asia
- REL 380: New Religions and Religion-Like Movements; Western Esotericism
- REL 399: Other
- REL 120: Religious Phenomenology
- REL 400: Theology; Christianity
- REL 410: Systematic Theology
- REL 500: Practical Theology
- REL 600: Historical Theology
- REL 610: Biblical Science
- REL 620: Bible
- REL 700: Biblical Introduction; Bible Studies
- REL 730: Study of Biblical Geography and Archaeology
- REL 749: Other
- REL 750: History of the Church and Theology (History According to Periods)
- REL 762: Transperiodic History of the Church
- REL 764: Transperiodic History of the Councils
- REL 766: Transperiodic History of the Pope
- REL 770: Old Church (up to about 100 A.d.); Patristics
- REL 780: Church between the Ancient World and the New Age (about 100 - 1650 A.d.)
- REL 805: Reformation and Counter-Reformation
- REL 810: New Age Church (since about 1650 A.d.)
- REL 762: Transperiodic History of the Church
- REL 830: Eastern Church
- REL 860: History of Religious Orders
- REL 870: Hagiography
- REL 880: Mission History
- REL 900: History of Churches and Theology of Individual Countries
- REL 999: Persons in the History of the Church and Theology
- REL 610: Biblical Science