Classification
000 - Computer science, information & general works
6
003 - Systems
2
006 - Special computer methods
4
062 - Organizations in British Isles; in England
1
100 - Philosophy & psychology
1
140 - Specific philosophical schools
3
170 - Ethics
1
300 - Social sciences
1
304 - Factors affecting social behavior
1
320 - Political science
8
330 - Economics
34
332 - Financial economics
1
333 - Economics of land & energy
73
338 - Production
10
341 - Law of nations
1
344 - Labor, social, education & cultural law
2
363 - Other social problems & services
30
380 - Commerce, communications & transportation
6
393 - Death customs
1
414 - Phonology & phonetics
2
500 - Natural sciences & mathematics
2
526 - Mathematical geography
9
530 - Physics
3
531 - Classical mechanics; solid mechanics
1
540 - Chemistry & allied sciences
5
541 - Physical chemistry
7
543 - Analytical chemistry
2
546 - Inorganic chemistry
1
547 - Organic chemistry
2
549 - Mineralogy
14
550 - Earth sciences
13
551 - Geology, hydrology & meteorology
70
552 - Petrology
1
553 - Economic geology
9
560 - Paleontology; paleozoology
4
574 - [Unassigned]
1
576 - Genetics & evolution
3
577 - Ecology
5
580 - Plants (Botany)
3
581 - Specific topics in natural history
2
600 - Technology
17
604 - Special topics
1
610 - Medicine & health
4
620 - Engineering & allied operations
28
621 - Applied physics
202
622 - Mining & related operations
2
624 - Civil engineering
24
627 - Hydraulic engineering
5
628 - Sanitary & municipal engineering
7
629 - Other branches of engineering
7
more ...