Science Sciences 42 Technology 34 Research 22 Engineering 19 Natuurwetenschappen 16 History 14 Philosophy 13 Exacte wetenschappen 12 Study and teaching 12 history 12 Medicine 11 Social aspects 11 Technologie 10 Biology 8 Mathematics 8 Naturwissenschaften 8 Histoire 7 Natural history 7 Zeitschrift 7 Data processing 6 Social sciences 6 30.00 exact sciences: general 5 History of Medicine 5 E ́tude et enseignement 4 Geneeskunde 4 Publications pe ́riodiques 4 Technical education 4 Agriculture 3 Aspect social 3