Classification
000 - Computer science, information & general works
380 - Commerce, communications & transportation
700 - The arts; fine & decorative arts
30
333 - Economics of land & energy
25
363 - Other social problems & services
23
600 - Technology
20
140 - Specific philosophical schools
15
580 - Plants (Botany)
14
610 - Medicine & health
14
330 - Economics
12
900 - History & geography
11
320 - Political science
10
551 - Geology, hydrology & meteorology
10
620 - Engineering & allied operations
9
658 - General management
7
300 - Social sciences
5
370 - Education
5
500 - Natural sciences & mathematics
5
540 - Chemistry & allied sciences
5
630 - Agriculture & related technologies
5
100 - Philosophy & psychology
4
530 - Physics
4
576 - Genetics & evolution
4
612 - Human physiology
4
720 - Architecture
4
800 - Literature & rhetoric
4
384 - Communications; telecommunication
3
414 - Phonology & phonetics
3
170 - Ethics
2
338 - Production
2
581 - Specific topics in natural history
2
120 - Epistemology, causation & humankind
1
153 - Mental processes & intelligence
1
302 - Social interaction
1
340 - Law
1
410 - Linguistics
1
550 - Earth sciences
1
650 - Management & auxiliary services
1
780 - Music
1
920 - Biography, genealogy & insignia
1