Classification
620 - Engineering & allied operations
1,068
621 - Applied physics
294
530 - Physics
202
600 - Technology
150
610 - Medicine & health
126
541 - Physical chemistry
112
660 - Chemical engineering
87
700 - The arts; fine & decorative arts
68
570 - Life sciences; biology
41
571 - Physiology & related subjects
39
363 - Other social problems & services
35
500 - Natural sciences & mathematics
33
333 - Economics of land & energy
32
543 - Analytical chemistry
30
616 - Diseases
27
537 - Electricity & electronics
25
630 - Agriculture & related technologies
24
538 - Magnetism
22
540 - Chemistry & allied sciences
22
615 - Pharmacology & therapeutics
22
547 - Organic chemistry
19
628 - Sanitary & municipal engineering
18
629 - Other branches of engineering
18
577 - Ecology
17
000 - Computer science, information & general works
16
338 - Production
16
572 - Biochemistry
16
670 - Manufacturing
16
658 - General management
15
900 - History & geography
15
539 - Modern physics
14
531 - Classical mechanics; solid mechanics
13
546 - Inorganic chemistry
13
580 - Plants (Botany)
13
631 - Techniques, equipment & materials
13
612 - Human physiology
11
664 - Food technology
11
535 - Light & infrared & ultraviolet phenomena
9
579 - Microorganisms, fungi & algae
9
004 - Data processing & computer science
8
380 - Commerce, communications & transportation
8
300 - Social sciences
7
330 - Economics
7
414 - Phonology & phonetics
6
681 - Precision instruments & other devices
6
003 - Systems
5
062 - Organizations in British Isles; in England
5
140 - Specific philosophical schools
5
170 - Ethics
5
624 - Civil engineering
4
more ...