Classification
363 - Other social problems & services
600 - Technology
700 - The arts; fine & decorative arts
620 - Engineering & allied operations
240
900 - History & geography
177
333 - Economics of land & energy
171
000 - Computer science, information & general works
110
330 - Economics
102
610 - Medicine & health
92
380 - Commerce, communications & transportation
79
580 - Plants (Botany)
68
140 - Specific philosophical schools
58
320 - Political science
49
551 - Geology, hydrology & meteorology
49
576 - Genetics & evolution
37
370 - Education
33
630 - Agriculture & related technologies
31
720 - Architecture
31
581 - Specific topics in natural history
25
340 - Law
20
500 - Natural sciences & mathematics
20
658 - General management
19
800 - Literature & rhetoric
18
414 - Phonology & phonetics
17
540 - Chemistry & allied sciences
17
400 - Language
11
100 - Philosophy & psychology
9
612 - Human physiology
8
304 - Factors affecting social behavior
7
170 - Ethics
6
300 - Social sciences
6
530 - Physics
6
200 - Religion
5
361 - Social problems & social welfare in general
4
410 - Linguistics
3
615 - Pharmacology & therapeutics
3
770 - Photography, photographs & computer art
3
297 - Islam, Babism & Bahai Faith
2
650 - Management & auxiliary services
2
657 - Accounting
2
120 - Epistemology, causation & humankind
1
160 - Logic
1
301 - Sociology & anthropology
1
350 - Public administration & military science
1
360 - Social problems & services; associations
1
398 - Folklore
1
520 - Astronomy & allied sciences
1
780 - Music
1