Classification
629 - Other branches of engineering
003 - Systems
726
620 - Engineering & allied operations
206
745 - Decorative arts
80
600 - Technology
50
500 - Natural sciences & mathematics
45
790 - Recreational & performing arts
45
331 - Labor economics
34
658 - General management
21
338 - Production
14
384 - Communications; telecommunication
12
621 - Applied physics
11
330 - Economics
9
006 - Special computer methods
8
005 - Computer programming, programs & data
5
381 - Commerce
5
610 - Medicine & health
5
510 - Mathematics
4
521 - Celestial mechanics
4
000 - Computer science, information & general works
3
374 - Adult education
3
001 - Knowledge
2
004 - Data processing & computer science
2
300 - Social sciences
2
363 - Other social problems & services
2
519 - Probabilities & applied mathematics
2
602 - Miscellany
2
670 - Manufacturing
2
800 - Literature & rhetoric
2
140 - Specific philosophical schools
1
153 - Mental processes & intelligence
1
172 - Political ethics
1
302 - Social interaction
1
303 - Social processes
1
332 - Financial economics
1
333 - Economics of land & energy
1
339 - Macroeconomics & related topics
1
372 - Elementary education
1
511 - General principles of mathematics
1
531 - Classical mechanics; solid mechanics
1
612 - Human physiology
1
650 - Management & auxiliary services
1
659 - Advertising & public relations
1
664 - Food technology
1