Classification
333 - Economics of land & energy
600 - Technology
112
620 - Engineering & allied operations
86
900 - History & geography
72
700 - The arts; fine & decorative arts
71
330 - Economics
58
000 - Computer science, information & general works
46
363 - Other social problems & services
43
380 - Commerce, communications & transportation
37
580 - Plants (Botany)
24
320 - Political science
20
551 - Geology, hydrology & meteorology
18
630 - Agriculture & related technologies
16
610 - Medicine & health
15
500 - Natural sciences & mathematics
11
576 - Genetics & evolution
9
340 - Law
8
658 - General management
7
140 - Specific philosophical schools
6
414 - Phonology & phonetics
6
370 - Education
5
530 - Physics
4
540 - Chemistry & allied sciences
4
304 - Factors affecting social behavior
3
621 - Applied physics
3
720 - Architecture
3
800 - Literature & rhetoric
3
300 - Social sciences
2
361 - Social problems & social welfare in general
2
400 - Language
2
550 - Earth sciences
2
612 - Human physiology
2
780 - Music
2
100 - Philosophy & psychology
1
200 - Religion
1
332 - Financial economics
1
338 - Production
1
350 - Public administration & military science
1
381 - Commerce
1
410 - Linguistics
1
510 - Mathematics
1
581 - Specific topics in natural history
1
657 - Accounting
1