Classification
000 - Computer science, information & general works
700 - The arts; fine & decorative arts
900 - History & geography
600 - Technology
157
620 - Engineering & allied operations
153
333 - Economics of land & energy
122
363 - Other social problems & services
65
330 - Economics
59
380 - Commerce, communications & transportation
59
140 - Specific philosophical schools
36
576 - Genetics & evolution
36
610 - Medicine & health
31
720 - Architecture
29
580 - Plants (Botany)
28
320 - Political science
27
551 - Geology, hydrology & meteorology
22
370 - Education
20
500 - Natural sciences & mathematics
15
581 - Specific topics in natural history
14
340 - Law
13
414 - Phonology & phonetics
13
530 - Physics
13
400 - Language
12
540 - Chemistry & allied sciences
12
800 - Literature & rhetoric
11
100 - Philosophy & psychology
10
630 - Agriculture & related technologies
8
658 - General management
7
780 - Music
5
200 - Religion
4
301 - Sociology & anthropology
4
410 - Linguistics
4
770 - Photography, photographs & computer art
4
170 - Ethics
3
304 - Factors affecting social behavior
3
361 - Social problems & social welfare in general
3
791 - Public performances
3
120 - Epistemology, causation & humankind
2
300 - Social sciences
2
590 - Animals (Zoology)
2
612 - Human physiology
2
160 - Logic
1
297 - Islam, Babism & Bahai Faith
1
398 - Folklore
1
520 - Astronomy & allied sciences
1
550 - Earth sciences
1
615 - Pharmacology & therapeutics
1
650 - Management & auxiliary services
1