Classification
004 - Data processing & computer science
493
006 - Special computer methods
390
005 - Computer programming, programs & data
271
621 - Applied physics
102
331 - Labor economics
78
000 - Computer science, information & general works
60
040 - [Unassigned]
57
745 - Decorative arts
57
658 - General management
53
620 - Engineering & allied operations
51
500 - Natural sciences & mathematics
45
003 - Systems
39
330 - Economics
25
338 - Production
20
384 - Communications; telecommunication
18
720 - Architecture
17
025 - Library operations
15
518 - Numerical analysis
13
670 - Manufacturing
12
300 - Social sciences
8
381 - Commerce
5
401 - Philosophy & theory
5
512 - Algebra
5
700 - The arts; fine & decorative arts
5
001 - Knowledge
4
333 - Economics of land & energy
4
374 - Adult education
4
510 - Mathematics
4
530 - Physics
4
600 - Technology
4
519 - Probabilities & applied mathematics
3
302 - Social interaction
2
511 - General principles of mathematics
2
534 - Sound & related vibrations
2
570 - Life sciences; biology
2
576 - Genetics & evolution
2
629 - Other branches of engineering
2
153 - Mental processes & intelligence
1
363 - Other social problems & services
1
370 - Education
1
380 - Commerce, communications & transportation
1
400 - Language
1
515 - Analysis
1
537 - Electricity & electronics
1
541 - Physical chemistry
1
542 - Techniques, equipment & materials
1
551 - Geology, hydrology & meteorology
1
572 - Biochemistry
1
612 - Human physiology
1
630 - Agriculture & related technologies
1
more ...