00=Science in general (information technology - 004)
001=Science in general. Science studies. Organization of mental work
002=Printing in general. Documentation. Scientific and technical information (NTI)
003=Writing and writing systems. Signs and symbols. Semiotics in general. Codes. Graphic representation of thought
004=Information technology. Computer technology. Theory of computing machines and systems
005=Study of the problem of organization: methodology, analysis, synthesis, classification and taxonomy (theory, foundations), systematization in general
006=Standardization and standards
007=Activity and organization. General theory of information, communication and control (cybernetics), including human activity
008=Civilization. Culture. Progress
009=Humanities in general
1=Philosophy. Psychology
101=The Essence and Tasks of Philosophy
101.1=The Essence of Philosophy. Philosophy as a Science. Philosophy as an Art.
101.2=The Possibilities of Philosophy. Is Philosophy Possible?
101.3=The Subject of Philosophy
101.8=Philosophical Methods. [Dialectical Materialism]
101.9=The Personality and Calling (Purpose) of Philosophers
11=Metaphysics
122=Causality. Primordial Cause. Principles. Causa efficiens. Condition. Action. Motivation
123=Freedom and Necessity
124=Teleology
125=Finity. Infinity. The Infinite and Boundless. Universe
128=Soul. The Meaning of Life and Death
129=The Origin and Destiny of Individual Souls. The Journey of Souls. Embodiment of the soul. Immortality of the soul
13=Philosophy of the spirit. Metaphysics of spiritual life
14=Philosophical systems. Metaphysical and ontological concepts
159.9=Psychology
16=Logic. Theory of knowledge. Methodology and logic of science
17=Ethics. The doctrine of morality. Practical philosophy
18=Aesthetics
2=Religion. Theology
30=Theory and methods of social sciences
31=Demography. Sociology. Statistics
32=Politics
33=Economics. National economy. Economic sciences
34=Law. Legal sciences
35=Public administrative management. Military art. Military sciences
36=Provision of spiritual and material vital needs. Social security. Social assistance. Housing. Insurance
37=Public education. Upbringing. Training. Organization of leisure
39=Ethnography. Morals. Customs. Life of the people. Folklore
50=General issues of mathematical and natural sciences
51=Mathematics
52=Astronomy. Geodesy
53=Physics
54=Chemistry. Crystallography. Mineralogy
55=Geology. Geological and geophysical sciences
56=Paleontology
57=Biological sciences
58=Botany
59=Zoology
60=Applied sciences. General issues
61=Medicine. Health protection. Fire fighting
62=Engineering. Technology in general
63=Agriculture. Forestry. Hunting. Fishing
64=Housekeeping. Public utilities. Consumer services
65=Enterprise management. Organization of production, trade and transport
66=Chemical technology. Chemical industry. Food industry. Metallurgy. Related industries
67=Various industries and crafts. Mechanical technology
68=Various industries and crafts producing final products. Precision mechanics
69=Construction. Construction materials. Construction and installation work
7=Art. Decorative and applied arts. Photography. Music. Games. Sports
8=Linguistics. Philology. Fiction. Literary criticism
9=Geography. Biography. History