Classification
600 - Technology
1,294
620 - Engineering & allied operations
1,294
900 - History & geography
1,294
700 - The arts; fine & decorative arts
594
333 - Economics of land & energy
481
363 - Other social problems & services
248
380 - Commerce, communications & transportation
218
000 - Computer science, information & general works
187
330 - Economics
154
610 - Medicine & health
127
580 - Plants (Botany)
126
140 - Specific philosophical schools
91
576 - Genetics & evolution
90
551 - Geology, hydrology & meteorology
59
340 - Law
52
500 - Natural sciences & mathematics
52
720 - Architecture
52
414 - Phonology & phonetics
51
320 - Political science
44
540 - Chemistry & allied sciences
35
630 - Agriculture & related technologies
31
370 - Education
30
658 - General management
28
800 - Literature & rhetoric
28
530 - Physics
25
400 - Language
15
304 - Factors affecting social behavior
13
581 - Specific topics in natural history
12
410 - Linguistics
7
780 - Music
7
300 - Social sciences
6
550 - Earth sciences
6
612 - Human physiology
6
770 - Photography, photographs & computer art
6
100 - Philosophy & psychology
5
170 - Ethics
5
657 - Accounting
5
120 - Epistemology, causation & humankind
3
160 - Logic
2
361 - Social problems & social welfare in general
2
615 - Pharmacology & therapeutics
2
200 - Religion
1
297 - Islam, Babism & Bahai Faith
1
520 - Astronomy & allied sciences
1
650 - Management & auxiliary services
1