Classification
610 - Medicine & health
16
363 - Other social problems & services
4
570 - Life sciences; biology
3
370 - Education
2
623 - Military & nautical engineering
2
000 - Computer science, information & general works
1
170 - Ethics
1
380 - Commerce, communications & transportation
1
600 - Technology
1
660 - Chemical engineering
1
700 - The arts; fine & decorative arts
1