Classification
005 - Computer programming, programs & data
298
658 - General management
127
006 - Special computer methods
79
004 - Data processing & computer science
53
003 - Systems
41
000 - Computer science, information & general works
32
500 - Natural sciences & mathematics
20
330 - Economics
17
621 - Applied physics
12
745 - Decorative arts
10
620 - Engineering & allied operations
8
650 - Management & auxiliary services
8
025 - Library operations
7
331 - Labor economics
6
519 - Probabilities & applied mathematics
5
600 - Technology
5
300 - Social sciences
4
570 - Life sciences; biology
4
670 - Manufacturing
4
338 - Production
3
374 - Adult education
3
302 - Social interaction
2
333 - Economics of land & energy
2
343 - Military, tax, trade & industrial law
2
362 - Social welfare problems & services
2
384 - Communications; telecommunication
2
510 - Mathematics
2
530 - Physics
2
610 - Medicine & health
2
616 - Diseases
2
651 - Office services
2
910 - Geography & travel
2
303 - Social processes
1
323 - Civil & political rights
1
351 - Public administration
1
361 - Social problems & social welfare in general
1
380 - Commerce, communications & transportation
1
381 - Commerce
1
502 - Miscellany
1
511 - General principles of mathematics
1
523 - Specific celestial bodies & phenomena
1
526 - Mathematical geography
1
542 - Techniques, equipment & materials
1
550 - Earth sciences
1
551 - Geology, hydrology & meteorology
1
572 - Biochemistry
1
577 - Ecology
1
590 - Animals (Zoology)
1
629 - Other branches of engineering
1
668 - Technology of other organic products
1