Classification
004 - Data processing & computer science
3
005 - Computer programming, programs & data
2
333 - Economics of land & energy
2
577 - Ecology
2
612 - Human physiology
2
006 - Special computer methods
1
509 - Historical, geographic & persons treatment
1
550 - Earth sciences
1
621 - Applied physics
1
808 - Rhetoric & collections of literature
1
910 - Geography & travel
1