Classification
500 - Natural sciences & mathematics
620 - Engineering & allied operations
22
363 - Other social problems & services
20
576 - Genetics & evolution
20
700 - The arts; fine & decorative arts
17
330 - Economics
15
000 - Computer science, information & general works
14
600 - Technology
14
580 - Plants (Botany)
13
610 - Medicine & health
12
333 - Economics of land & energy
11
551 - Geology, hydrology & meteorology
11
630 - Agriculture & related technologies
9
664 - Food technology
8
140 - Specific philosophical schools
7
380 - Commerce, communications & transportation
7
581 - Specific topics in natural history
7
658 - General management
7
300 - Social sciences
5
540 - Chemistry & allied sciences
5
338 - Production
4
612 - Human physiology
4
414 - Phonology & phonetics
3
900 - History & geography
3
320 - Political science
2
370 - Education
2
400 - Language
2
800 - Literature & rhetoric
2
332 - Financial economics
1
340 - Law
1
381 - Commerce
1
629 - Other branches of engineering
1
641 - Food & drink
1
657 - Accounting
1
660 - Chemical engineering
1
663 - Beverage technology
1
745 - Decorative arts
1
920 - Biography, genealogy & insignia
1