Classification
330 - Economics
500 - Natural sciences & mathematics
600 - Technology
620 - Engineering & allied operations
12
700 - The arts; fine & decorative arts
900 - History & geography
333 - Economics of land & energy
7
000 - Computer science, information & general works
4
576 - Genetics & evolution
4
340 - Law
3
140 - Specific philosophical schools
2
380 - Commerce, communications & transportation
2
414 - Phonology & phonetics
2
658 - General management
2
100 - Philosophy & psychology
1
300 - Social sciences
1
320 - Political science
1
370 - Education
1
400 - Language
1
530 - Physics
1
540 - Chemistry & allied sciences
1
580 - Plants (Botany)
1
610 - Medicine & health
1
720 - Architecture
1
780 - Music
1