Classification
331 - Labor economics
658 - General management
55
004 - Data processing & computer science
42
005 - Computer programming, programs & data
42
006 - Special computer methods
41
302 - Social interaction
31
500 - Natural sciences & mathematics
28
745 - Decorative arts
24
620 - Engineering & allied operations
21
000 - Computer science, information & general works
19
381 - Commerce
15
330 - Economics
14
384 - Communications; telecommunication
13
770 - Photography, photographs & computer art
9
300 - Social sciences
7
338 - Production
7
374 - Adult education
7
900 - History & geography
7
629 - Other branches of engineering
6
650 - Management & auxiliary services
6
790 - Recreational & performing arts
6
600 - Technology
5
158 - Applied psychology
4
153 - Mental processes & intelligence
3
700 - The arts; fine & decorative arts
3
621 - Applied physics
2
659 - Advertising & public relations
2
670 - Manufacturing
2
741 - Drawing & drawings
2
150 - Psychology
1
306 - Culture & institutions
1
320 - Political science
1
343 - Military, tax, trade & industrial law
1
344 - Labor, social, education & cultural law
1
363 - Other social problems & services
1
398 - Folklore
1
519 - Probabilities & applied mathematics
1
612 - Human physiology
1
688 - Other final products & packaging
1
778 - Fields & kinds of photography
1
779 - Photographs
1
941 - British Isles
1