The majority of CTU's collection falls in the "B" classification, for Philosophy, Psychology, and Religion. Here's a list of the subclasses under "B."
Philosophy (General)
- B69-99 General works
- B108-5802 By period (Including individual philosophers and schools of philosophy)
- B108-708 Ancient
- B720-765 Medieval
- B770-785 Renaissance
- B790-5802 Modern
BC - Logic
- BC11-39 History
- BC60-99 General works
- BC171-199 Special topics
BD - Speculative philosophy
- BD10-41 General philosophical works
- BD95-131 Metaphysics
- BD143-237 Epistemology. Theory of knowledge
- BD240-260 Methodology
- BD300-450 Ontology (Including being, the soul, life, death)
- BD493-701 Cosmology (Including teleology, space and time, structure of matter, plurality of worlds)
BF - Psychology
- BF1-990 Psychology
- BF173-175.5 Psychoanalysis
- BF180-198.7 Experimental psychology
- BF309-499 Consciousness. Cognition
- BF505-505 Motivation
- BF660-685 Comparative psychology
- BF698 Personality
- BF712-724 Developmental psychology
- BF1001-1389 Parapsychology
- BF1404-2055 Occult sciences
BH - Aesthetics
BJ - Ethics
- BJ1-1725 Ethics
- BJ71-1185 History and general works (Including individual ethical philosophers)
- BJ1188-1295 Religious ethics
- BJ1395 Feminist ethics
- BJ1518-1697 Individual ethics. Character. Virtue
- BJ1801-2195 Social usages. Etiquette.
BL - Religions. Mythology. Rationalism
- BL1-50 Religion (General)
- BL51-65 Philosophy of religion. Psychology of religion. Religion in relation to other subjects
- BL70-71 Sacred books (General)
- BL175-265 Natural Theology
- BL300-325 The myth. Comparative mythology.
- BL350-385 Classification of religions
- BL425-490 Religion doctrines (General)
- BL500-547 Eschatalogy
- BL550-619 Worship. Cultus
- BL660-2680 History and principles of religions
- BL660 Indo-European. Aryan
- BL685 Ural-Altaic
- BL687 Mediterranean region
- BL689-980 European. Occidental
- BL1000-2370 Asian. Oriental
- BL2390-2490 African
- BL2500-2592 American
- BL2600-2630 Pacific Ocean islands. Oceania
- BL2700-27990 Rationalism
BM - Judaism
- BM1-449 General
- BM495-532 Sources of Jewish religion. Rabbinical literature
- BM545-582 Principles of Judaism (General)
- BM600-645 Dogmatic Judaism
- BM648 Apologetics
- BM650-747 Practical Judaism
- BM656-657 Forms of worship
- BM700-720 Rites and customs
- BM723-729 Jewish way of life. Spiritual life. Mysticism. Personal religion. Moral theology
- BM750-755 Biography
- BM900-990 Samaritans
BP - Islam. Bahaism. Theosophy, etc.
- BP1-253 Islam
- BP42-48 Study and teaching
- BP50-68 History
- BP70-80 Biography
- BP87-89 Islamic literature
- BP100-157 Sacred books
- BP100-134 Koran
- BP135-136 Hadith literature. Traditions. Sunna
- BP160-165 General works on Islam
- BP166 Theology
- BP170 Works in defense of Islam. Islam apologetics
- BP174-190 The practice of Islam
- BP191-253 Branches, sects, etc.
- BP300-395 Bahai Faith
- BP500-585 Theosophy
- BP595-597 Anthroposophy
- BP600-610 Other beliefs and movements
BQ - Buddhism
- BQ115-126 General collections. Collected works
- BQ128 Encyclopedias (General)
- BQ130 Dictionaries (General)
- BQ141-209 Religious education (General)
- BQ251-799 History
- BQ840-999 Biography
- BQ1001-1045 Buddhist literature
- BQ1100-3340 Tripitaka (Canonical literature)
- BQ4000-4060 General works
- BQ4061-4570 Doctrinal and systematic Buddhism
- BQ4600-4610 Relation to other religious and philosophical systems
- BQ4911-5720 Practice of Buddhism. Forms of worship
- BQ4965-5030 Ceremonies and rites
- BQ5360-5680 Religious life
- BQ6300-6388 Monasteries. Temples. Shrines. Sites
- BQ6400-6495 Pilgrims and pilgrimages
- BQ7001-9800 Modifications, schools, etc.
BR - Christianity
- BR60-67 Early Christian literature. Fathers of the Church, etc.
- BR115 Christianity in relation to special subjects
- BR130-133.5 Christian antiquities. Archaeology. Museums
- BR140-1510 History
- BR160-481 By period
- BR160-275 Early and medieval
- BR280 Renaissance. Renaissance and Reformation
- BR290-481 Modern period
- BR323.5-334.2 Luther, Martin
- BR500-1510 By region or country
- BR1600-1609 Persecution. Martyrs
- BR1609.5 Dissent
- BR1610 Tolerance and toleration
- BR1615-1617 Liberalism
- BR1620 Sacrilege (History)
- BR1690-1725 Biography
BS - The Bible
- BS11-115 Early Versions
- BS125-355 Modern texts and versions
- BS125-198 English
- BS199-313 Other European languages
- BS315-355 Non-European languages
- BS410-680 Works about the Bible
- BS500-534.8 Criticism and interpretation
- BS535-537 Bible as literature
- BS585-613 Study and teaching
- BS650-667 Bible and science
- BS701-1830 Old Testament
- BS1901-2970 New Testament
BT - Doctrinal Theology
- BT19-37 Doctrine and dogma
- BT98-180 God
- BT198-590 Christology
- BT595-680 Mary, Mother of Jesus Christ. Mariology
- BT695-749 Creation
- BT750-811 Salvation. Soteriology
- BT819-891 Eschatology. Last things
- BT990-1010 Creeds, confessions, covenants, etc.
- BT1029-1040 Catechisms
- BT1095-1255 Apologetics. Evidences of Christianity
- BT1313-1480 History of specific doctrines and movements. Heresies and schisms
BV - Practical Theology
- BV5-530 Worship (Public and private)
- BV590-1652 Ecclesiastical theology
- BV598-603 The Church
- BV629-631 Church and state
- BV700-707 Parish. Congregation. The local church
- BV800-873 Sacraments. Ordinances
- BV900-1450 Religions societies, associations, etc.
- BV2000-3705 Missions
- BV3750-3799 Evangelism. Revivals
- BV4000-4470 Pastoral Theology
- BV4019-4180 Education
- BV4200-4317 Preaching. Homiletics
- BV4485-5099 Practical religion. The Christian life
- BV4625-4780 Moral theology
- BV4800-4897 Works of meditation and devotion
BX - Christian Denominations
- BX1-9.5 Church unity. Ecumenical movement. Interdenominational cooperation
- BX100-189 Eastern churches. Oriental churches
- BX200-756 Orthodox Eastern Church
- BX800-4795 Catholic Church
- BX940-1745 History
- BX1958-1968 Creeds and catechisms
- BX1970-2175 Liturgy and ritual
- BX4800-9999 Protestantism
- BX4872-4924 Pre-Reformation
- BX4929-4951 Post-Reformation
- BX5011-5207 Church of England
- BX6101-9999 Other Protestant denominations (Alphabetical)
- BX6201-6495 Baptists
- BX6801-6843 Christian Reformed Church
- BX7101-7260 Congregationalism
- BX7601-7795 Friends. Society of Friends. Quakers
- BX8001-8080 Lutherans
- BX8201-8495 Methodism
- BX8601-8695 Mormons. Church of Jesus Christ of Latter-Day Saints
- BX8762-8785 Pentacostal churches
- BX9401-9640 Reformed or Calvinistic Churches
- BX9801-9869 Unitarian Churches
- BX9999 Independent churches, parishes, societies, etc.