Classification
140 - Specific philosophical schools
610 - Medicine & health
700 - The arts; fine & decorative arts
900 - History & geography
600 - Technology
22
620 - Engineering & allied operations
21
333 - Economics of land & energy
14
000 - Computer science, information & general works
9
580 - Plants (Botany)
9
330 - Economics
8
363 - Other social problems & services
8
380 - Commerce, communications & transportation
8
320 - Political science
5
720 - Architecture
5
576 - Genetics & evolution
4
630 - Agriculture & related technologies
3
800 - Literature & rhetoric
3
170 - Ethics
2
300 - Social sciences
2
301 - Sociology & anthropology
2
340 - Law
2
615 - Pharmacology & therapeutics
2
200 - Religion
1
360 - Social problems & services; associations
1
370 - Education
1
398 - Folklore
1
400 - Language
1
414 - Phonology & phonetics
1
500 - Natural sciences & mathematics
1
530 - Physics
1
540 - Chemistry & allied sciences
1
550 - Earth sciences
1
581 - Specific topics in natural history
1
657 - Accounting
1
658 - General management
1