Classification
000 - Computer science, information & general works
22
600 - Technology
19
700 - The arts; fine & decorative arts
19
333 - Economics of land & energy
13
330 - Economics
10
363 - Other social problems & services
9
620 - Engineering & allied operations
9
610 - Medicine & health
8
900 - History & geography
8
380 - Commerce, communications & transportation
6
580 - Plants (Botany)
6
551 - Geology, hydrology & meteorology
5
720 - Architecture
4
400 - Language
3
540 - Chemistry & allied sciences
3
581 - Specific topics in natural history
3
140 - Specific philosophical schools
2
340 - Law
2
414 - Phonology & phonetics
2
500 - Natural sciences & mathematics
2
630 - Agriculture & related technologies
2
658 - General management
2
800 - Literature & rhetoric
2
170 - Ethics
1
370 - Education
1
576 - Genetics & evolution
1
612 - Human physiology
1
615 - Pharmacology & therapeutics
1
741 - Drawing & drawings
1
745 - Decorative arts
1
780 - Music
1