Classification
700 - The arts; fine & decorative arts
600 - Technology
63
000 - Computer science, information & general works
48
620 - Engineering & allied operations
45
900 - History & geography
43
330 - Economics
40
333 - Economics of land & energy
34
610 - Medicine & health
34
658 - General management
29
001 - Knowledge
26
140 - Specific philosophical schools
23
363 - Other social problems & services
19
380 - Commerce, communications & transportation
19
005 - Computer programming, programs & data
17
580 - Plants (Botany)
14
006 - Special computer methods
13
500 - Natural sciences & mathematics
11
576 - Genetics & evolution
11
720 - Architecture
9
670 - Manufacturing
8
530 - Physics
7
153 - Mental processes & intelligence
6
320 - Political science
6
331 - Labor economics
6
340 - Law
6
414 - Phonology & phonetics
5
630 - Agriculture & related technologies
5
370 - Education
4
374 - Adult education
4
384 - Communications; telecommunication
4
540 - Chemistry & allied sciences
4
770 - Photography, photographs & computer art
4
200 - Religion
3
612 - Human physiology
3
800 - Literature & rhetoric
3
160 - Logic
2
170 - Ethics
2
338 - Production
2
400 - Language
2
519 - Probabilities & applied mathematics
2
551 - Geology, hydrology & meteorology
2
615 - Pharmacology & therapeutics
2
004 - Data processing & computer science
1
100 - Philosophy & psychology
1
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
332 - Financial economics
1
381 - Commerce
1
398 - Folklore
1
410 - Linguistics
1
more ...