Classification
530 - Physics
700 - The arts; fine & decorative arts
333 - Economics of land & energy
141
000 - Computer science, information & general works
121
600 - Technology
51
620 - Engineering & allied operations
37
900 - History & geography
37
380 - Commerce, communications & transportation
33
500 - Natural sciences & mathematics
33
576 - Genetics & evolution
24
540 - Chemistry & allied sciences
21
330 - Economics
20
340 - Law
20
363 - Other social problems & services
20
140 - Specific philosophical schools
17
610 - Medicine & health
16
100 - Philosophy & psychology
14
580 - Plants (Botany)
13
551 - Geology, hydrology & meteorology
12
370 - Education
11
720 - Architecture
8
800 - Literature & rhetoric
8
170 - Ethics
7
300 - Social sciences
7
320 - Political science
7
414 - Phonology & phonetics
7
658 - General management
7
200 - Religion
6
120 - Epistemology, causation & humankind
5
301 - Sociology & anthropology
5
520 - Astronomy & allied sciences
5
630 - Agriculture & related technologies
5
304 - Factors affecting social behavior
4
400 - Language
3
410 - Linguistics
3
791 - Public performances
3
550 - Earth sciences
2
581 - Specific topics in natural history
2
650 - Management & auxiliary services
2
770 - Photography, photographs & computer art
2
160 - Logic
1
296 - Judaism
1
350 - Public administration & military science
1
590 - Animals (Zoology)
1
657 - Accounting
1
780 - Music
1