Classification
540 - Chemistry & allied sciences
600 - Technology
56
620 - Engineering & allied operations
43
363 - Other social problems & services
35
000 - Computer science, information & general works
24
330 - Economics
24
700 - The arts; fine & decorative arts
23
333 - Economics of land & energy
20
610 - Medicine & health
14
500 - Natural sciences & mathematics
9
580 - Plants (Botany)
7
900 - History & geography
7
380 - Commerce, communications & transportation
6
630 - Agriculture & related technologies
6
576 - Genetics & evolution
3
615 - Pharmacology & therapeutics
3
800 - Literature & rhetoric
3
140 - Specific philosophical schools
2
320 - Political science
2
340 - Law
2
414 - Phonology & phonetics
2
530 - Physics
2
551 - Geology, hydrology & meteorology
2
657 - Accounting
2
304 - Factors affecting social behavior
1
370 - Education
1
400 - Language
1
410 - Linguistics
1
510 - Mathematics
1
520 - Astronomy & allied sciences
1
612 - Human physiology
1
658 - General management
1