Classification
330 - Economics
1,711
005 - Computer programming, programs & data
208
658 - General management
188
006 - Special computer methods
187
621 - Applied physics
97
000 - Computer science, information & general works
78
004 - Data processing & computer science
68
620 - Engineering & allied operations
51
331 - Labor economics
46
338 - Production
44
500 - Natural sciences & mathematics
38
616 - Diseases
37
304 - Factors affecting social behavior
35
340 - Law
34
320 - Political science
33
003 - Systems
32
302 - Social interaction
23
374 - Adult education
23
381 - Commerce
23
519 - Probabilities & applied mathematics
22
570 - Life sciences; biology
22
530 - Physics
21
617 - Surgery & related medical specialties
21
300 - Social sciences
20
332 - Financial economics
20
001 - Knowledge
19
306 - Culture & institutions
19
363 - Other social problems & services
19
745 - Decorative arts
18
629 - Other branches of engineering
17
327 - International relations
16
370 - Education
16
610 - Medicine & health
16
510 - Mathematics
15
551 - Geology, hydrology & meteorology
14
670 - Manufacturing
14
333 - Economics of land & energy
12
384 - Communications; telecommunication
12
515 - Analysis
12
910 - Geography & travel
11
040 - [Unassigned]
10
301 - Sociology & anthropology
10
305 - Social groups
10
512 - Algebra
10
660 - Chemical engineering
10
809 - History, description & criticism
10
150 - Psychology
9
371 - Schools & their activities; special education
9
380 - Commerce, communications & transportation
9
511 - General principles of mathematics
9
more ...