000 ordinary level
00 1 knowledge problem
002 About books
003 system theory
004 data processing-computer science
005 computer program statistics, programs and data
006 special computer method
0 1 1 comprehensive directory
0 16 monograph catalogue
Library science and information science
050 comprehensive series publications and their indexes
Slavic version 057
250 Christian missions and regional churches
300 social sciences
320 politics
330 economics
333 land economics
338 production
355 military science
370 education
37 1 School Management, Special Education
382 international business foreign trade
384 communications and telecommunications
Measurement and standardization
400 language
500 Natural Science and Mathematics
50 1 theory and theory
502 miscellaneous works
503 dictionaries and daquan
505 consecutive publications
Organization and management
507 Education, research and related topics
5 10 mathematics
General principles of 5 1 1
5 12 Algebra and Number Theory
5 13 arithmetic
5 14 topology
5 15 analysis
5 16 geometry
5 19 probability and applied mathematics
526 mathematical geography
530 physics
53 1 classical mechanics and solid mechanics
Fluid mechanics, fluid mechanics
533 gas mechanics
534 Sound and related vibration
535 light and spotlight phenomenon
536 heat
537 power and electronics
538 magnetism
Modern physics
Chemistry and related disciplines
54 1 physical chemistry and theoretical chemistry
542 technology, equipment and materials
analytical chemistry
qualitative analysis
545 quantitative analysis
546 inorganic chemistry
547 organic chemistry
548 crystallography
549 mineralogy
550 earth science
55 1 Geology, Hydrology and Meteorology
600 technology
608 inventions and patents
Occurrence and prevention of 6 14 disease
620 project and related business
62 1 applied physics
Mining and related operations
623 Military and Ship Engineering
627 water conservancy project
628 Health and Municipal Engineering
629 Other projects
643 Residential and domestic equipment
65 1 office affairs
652 written communication processing
658 integrated management
Industrial oils, waxes and gases
669 metallurgy
67 1 metalworking and metalwork
68 1 precision instruments and other instruments