Classification
600 - Technology
59
620 - Engineering & allied operations
50
700 - The arts; fine & decorative arts
40
900 - History & geography
39
333 - Economics of land & energy
20
000 - Computer science, information & general works
18
414 - Phonology & phonetics
12
380 - Commerce, communications & transportation
11
330 - Economics
8
363 - Other social problems & services
6
576 - Genetics & evolution
6
610 - Medicine & health
6
140 - Specific philosophical schools
5
500 - Natural sciences & mathematics
5
530 - Physics
5
540 - Chemistry & allied sciences
5
580 - Plants (Botany)
5
340 - Law
3
547 - Organic chemistry
2
551 - Geology, hydrology & meteorology
2
621 - Applied physics
2
630 - Agriculture & related technologies
2
665 - Industrial oils, fats, waxes & gases
2
800 - Literature & rhetoric
2
320 - Political science
1
331 - Labor economics
1
400 - Language
1
541 - Physical chemistry
1
657 - Accounting
1
658 - General management
1
661 - Industrial chemicals
1
664 - Food technology
1