Classification
004 - Data processing & computer science
482
005 - Computer programming, programs & data
437
006 - Special computer methods
430
621 - Applied physics
102
025 - Library operations
66
003 - Systems
58
371 - Schools & their activities; special education
29
620 - Engineering & allied operations
9
910 - Geography & travel
8
303 - Social processes
7
658 - General management
7
020 - Library & information sciences
6
794 - Indoor games of skill
6
381 - Commerce
5
670 - Manufacturing
5
370 - Education
4
374 - Adult education
4
610 - Medicine & health
4
000 - Computer science, information & general works
3
330 - Economics
3
410 - Linguistics
3
519 - Probabilities & applied mathematics
3
534 - Sound & related vibrations
3
629 - Other branches of engineering
3
300 - Social sciences
2
363 - Other social problems & services
2
518 - Numerical analysis
2
650 - Management & auxiliary services
2
808 - Rhetoric & collections of literature
2
140 - Specific philosophical schools
1
150 - Psychology
1
301 - Sociology & anthropology
1
302 - Social interaction
1
333 - Economics of land & energy
1
338 - Production
1
343 - Military, tax, trade & industrial law
1
380 - Commerce, communications & transportation
1
515 - Analysis
1
570 - Life sciences; biology
1
612 - Human physiology
1
659 - Advertising & public relations
1