Classification
576 - Genetics & evolution
600 - Technology
700 - The arts; fine & decorative arts
620 - Engineering & allied operations
27
900 - History & geography
25
333 - Economics of land & energy
23
000 - Computer science, information & general works
13
380 - Commerce, communications & transportation
12
363 - Other social problems & services
11
330 - Economics
9
340 - Law
9
720 - Architecture
9
140 - Specific philosophical schools
8
500 - Natural sciences & mathematics
7
580 - Plants (Botany)
7
610 - Medicine & health
5
320 - Political science
4
414 - Phonology & phonetics
3
630 - Agriculture & related technologies
3
800 - Literature & rhetoric
3
170 - Ethics
2
300 - Social sciences
2
540 - Chemistry & allied sciences
2
410 - Linguistics
1
530 - Physics
1
551 - Geology, hydrology & meteorology
1
657 - Accounting
1
658 - General management
1