Classification
600 - Technology
554
620 - Engineering & allied operations
554
900 - History & geography
422
700 - The arts; fine & decorative arts
223
363 - Other social problems & services
196
333 - Economics of land & energy
170
330 - Economics
86
000 - Computer science, information & general works
69
380 - Commerce, communications & transportation
69
610 - Medicine & health
62
580 - Plants (Botany)
44
140 - Specific philosophical schools
35
500 - Natural sciences & mathematics
32
540 - Chemistry & allied sciences
28
576 - Genetics & evolution
28
630 - Agriculture & related technologies
26
320 - Political science
23
581 - Specific topics in natural history
23
340 - Law
22
551 - Geology, hydrology & meteorology
22
720 - Architecture
22
800 - Literature & rhetoric
18
370 - Education
17
400 - Language
11
658 - General management
11
304 - Factors affecting social behavior
9
100 - Philosophy & psychology
8
300 - Social sciences
8
414 - Phonology & phonetics
8
530 - Physics
8
170 - Ethics
5
770 - Photography, photographs & computer art
4
361 - Social problems & social welfare in general
3
410 - Linguistics
3
301 - Sociology & anthropology
2
590 - Animals (Zoology)
2
200 - Religion
1
336 - Public finance
1
360 - Social problems & services; associations
1
364 - Criminology
1
398 - Folklore
1
550 - Earth sciences
1
612 - Human physiology
1
615 - Pharmacology & therapeutics
1
780 - Music
1