Classification
600 - Technology
60
700 - The arts; fine & decorative arts
49
000 - Computer science, information & general works
47
620 - Engineering & allied operations
47
900 - History & geography
43
363 - Other social problems & services
35
333 - Economics of land & energy
29
380 - Commerce, communications & transportation
24
580 - Plants (Botany)
19
330 - Economics
18
610 - Medicine & health
17
630 - Agriculture & related technologies
16
576 - Genetics & evolution
13
140 - Specific philosophical schools
12
320 - Political science
12
720 - Architecture
12
340 - Law
10
551 - Geology, hydrology & meteorology
9
800 - Literature & rhetoric
8
414 - Phonology & phonetics
7
500 - Natural sciences & mathematics
7
658 - General management
7
530 - Physics
5
304 - Factors affecting social behavior
4
370 - Education
4
400 - Language
4
300 - Social sciences
3
170 - Ethics
2
550 - Earth sciences
2
770 - Photography, photographs & computer art
2
540 - Chemistry & allied sciences
1
581 - Specific topics in natural history
1
780 - Music
1