2	RELIGION
20	COMPARATIVE RELIGION
20.2	Christianity. Theology
21	PHILOSOPHY OF RELIGION
21.5	Theosophy
21.51	Anthroposophy
22	THE BIBLE. BIBLICAL RESEARCH
22.1	Old Testament
22.11	Old Testament historical books
22.12	Old Testament poetical books
22.13	Old Testament prophetic books
22.2	New Testament
22.21	Gospels
22.22	Acts of the Apostles. Epistles
22.3	Biblical persons
23	CHRISTIAN DOGMATICS. CHRISTIAN ETHICS
23.1	Concept of God. Work of God
23.2	Christology. Life of Jesus
23.3	Soteriology
23.31	Conversion. Being born again
23.6	Eschatology
23.7	Creeds. Catechisms
23.8	Christian ethics
24	CHRISTIAN DEVOTIONAL LITERATURE
24.1	Devotional books
24.11	Prayer. Devotions
24.12	Quotations of the day. Christian morning assemblies
24.2	Sermons. Homilies
24.21	Study of preaching. Homiletics
24.3	Hymns. Spiritual songs
24.31	Study of hymns. Hymnology
25	PRACTICAL THEOLOGY
25.2	Sacral theology
25.25	Sacraments. Church ceremonies
25.26	Church objects and symbols
25.3	Christian education and upbringing
25.4	Pastoral care
25.5	Church social work. Home mission. Evangelisation
26	CHRISTIAN MISSION
26.1	Asia
26.2	Africa
26.3	America
26.5	Australia. Oceania
28	CHRISTIAN CHURCHES AND COMMUNITIES. CHURCH HISTORY
28.1	Roman Catholic Church
28.2	Eastern Orthodox Church
28.4	Oriental churches
28.7	Protestant churches and communities
28.71	Finnish Evangelical Lutheran Church
28.7109	Finnish church history
28.714	Finnish revival movements
28.8	Other denominations of Christian origin
29	NON-CHRISTIAN RELIGIONS AND MYTHOLOGIES
29.2	Ancient religions and mythologies of the Finno-Ugric peoples
29.3	Religions and mythologies of the antiquity
29.4	Ancient Germanic, ancient Baltic, ancient Norse, ancient Slavonic and ancient Celtic religions and mythologies
29.5	Oriental religions and mythologies
29.51	Religions and mythologies of Eastern Asia
29.52	Religions and mythologies of India
29.53	Buddhism and Buddhist mythology
29.6	Judaism and Jewish mythology
29.7	Islam and Islamic mythology
29.9	Religions and mythologies of the indigenous peoples