Classification
621 - Applied physics
620 - Engineering & allied operations
1,070
004 - Data processing & computer science
503
384 - Communications; telecommunication
464
745 - Decorative arts
290
331 - Labor economics
167
500 - Natural sciences & mathematics
146
658 - General management
90
333 - Economics of land & energy
85
781 - General principles & musical forms
82
535 - Light & infrared & ultraviolet phenomena
71
338 - Production
49
510 - Mathematics
48
374 - Adult education
30
000 - Computer science, information & general works
26
006 - Special computer methods
26
330 - Economics
18
600 - Technology
17
005 - Computer programming, programs & data
11
302 - Social interaction
11
629 - Other branches of engineering
11
381 - Commerce
8
770 - Photography, photographs & computer art
7
153 - Mental processes & intelligence
6
519 - Probabilities & applied mathematics
6
364 - Criminology
5
532 - Fluid mechanics; liquid mechanics
5
681 - Precision instruments & other devices
5
363 - Other social problems & services
4
530 - Physics
4
610 - Medicine & health
4
670 - Manufacturing
4
777 - [Unassigned]
4
790 - Recreational & performing arts
4
011 - Bibliographies
3
541 - Physical chemistry
3
602 - Miscellany
3
643 - Housing & household equipment
3
003 - Systems
2
300 - Social sciences
2
304 - Factors affecting social behavior
2
539 - Modern physics
2
623 - Military & nautical engineering
2
650 - Management & auxiliary services
2
660 - Chemical engineering
2
686 - Printing & related activities
2
696 - Utilities
2
697 - Heating, ventilating & air-conditioning
2
791 - Public performances
2
800 - Literature & rhetoric
2
more ...