Classification
000 - Computer science, information & general works
12
700 - The arts; fine & decorative arts
8
320 - Political science
6
333 - Economics of land & energy
6
380 - Commerce, communications & transportation
6
551 - Geology, hydrology & meteorology
6
600 - Technology
4
540 - Chemistry & allied sciences
3
620 - Engineering & allied operations
3
900 - History & geography
3
363 - Other social problems & services
2
550 - Earth sciences
2
630 - Agriculture & related technologies
2
304 - Factors affecting social behavior
1
330 - Economics
1
340 - Law
1
361 - Social problems & social welfare in general
1
414 - Phonology & phonetics
1
500 - Natural sciences & mathematics
1
530 - Physics
1
580 - Plants (Botany)
1
610 - Medicine & health
1