| 159.9 | 650 a- Psychology |
| 159.9(075) | a- Psychology v- Textbooks |
| 159.9(077) | a- Psychology x- Study and teaching |
| 159.9(09) | a- Psychology x- History |
| 159.9:0/9 | Applied psychology |
| 159.9:2 | Psychology, Religious |
| 159.9:316 | Social psychology |
| 159.9:32 | Political psychology |
| 159.9:331 | Psychology, Industrial |
| 159.9:34 | Legal psychology |
| 159.9:355 | Military psychology |
| 159.9:37 | Educational psychology |
| 159.9:4 | Psycholinguistics |
| 159.9:51 | a- Psychology x- Mathematical models |
| 159.9:61 | Medical psychology |
| 159.9:62 | Engineering psychology |
| 159.9:7 | a- Creative ability x-Psychological aspects a Creation (Literary, artistic, etc.) |x Psychological aspects |
| 159.9:796 | Sport psychology |
| 159.9:8 | a Creation (Literary, artistic, etc.) |x Psychological aspects |
| 159.91 | Psychophysiology |
| 159.92 | Comparative psychology. Genetic psychology |
| 159.922 | Differential psychology Differentiation (Developmental psychology) |
| 159.922.1 | a Sex role |x Psychological aspects a- Human beings |x Sexual behavior |
| 159.922.4 | Ethnic psychology |
| 159.922.6 | a- Aging x- Psychological aspects |
| 159.922.7 | Child psychology |
| 159.923 | Personality a- Individuality x- Physiological aspects |
| 159.923.2 | Maturation (Psychology) Self-consciousness (Awareness) Personality development |
| 159.923.3 | Character Psychographics Graphology |
| 159.923.4 | Temperament |
| 159.924 | Genius |
| 159.925 | Body language Gesture |
| 159.929 | Biopsychology Psychology, comparative Instinct |
| 159.93 | Senses and sensation |
| 159.938 | Psychophysics |
| 159.94 | Effector functions |
| 159.942 | Emotions |
| 159.943 | Motor function |
| 159.947 | Will Choice |
| 159.95 | Higher mental processes |
| 159.952 | Attention Interests |
| 159.953 | Memory Learning |
| 159.954 | Fantasy Imagination |
| 159.955 | Thought and thinking |
| 159.956 | Intuition |
| 159.96 | Special mental states and processes |
| 159.961 | Parapsychology Occultism. |
| 159.962 | Hypnotism Mesmerism. |
| 159.963 | Hallucinations Sleep Dreaming Somnambulism |
| 159.964.2 | Psychoanalysis |
| 159.97 | Abnormal psychology |
| 16 | Logic Theory of knowledge Methodology of logic |
| 161/162 | Fundamentals of logic |
| 164 | Logistic. Symbolic logic. Mathematical logic. Logical calculus |
| 165 | Theory of knowledge. Epistemology |
| 167/168 | Logical methodology |
| 17 | Ethics |
| 171 | Individual ethics |
| 172 | Social ethics |
| 173 | Family ethics |
| 174 | Professional ethics |
| 176 | Sexual ethics. Sexual morality |
| 177 | Ethics and society |
| 18 | Aesthetics |
| 18(075)/(077) | Aesthetics–Study and teaching Aesthetics–Study and teaching–Methodology |
| 18(09) | Aesthetics–History |
| 18(3) | Aesthetics, Ancient |
