R Medicine (General) 99 TP Chemical technology 48 Q Science (General) 20 QD Chemistry 18 RC Internal medicine 14 TK Electrical engineering. Electronics Nuclear engineering 10 RA Public aspects of medicine 8 RZ Other systems of medicine 8 BP Islam. Bahaism. Theosophy, etc 7 QA75 Electronic computers. Computer science 7 R Medicine 7 RA0421 Public health. Hygiene. Preventive Medicine 6 T Technology (General) 6 QK Botany 5 TA Engineering (General). Civil engineering (General) 5 QA Mathematics 4 QH Natural history 4 L Education (General) 3 Q Science 3 QC Physics 3 H Social Sciences (General) 2 HD28 Management. Industrial Management 2 QH301 Biology 2 RA1001 Forensic Medicine. Medical jurisprudence. Legal medicine 2 G Geography (General) 1 GV Recreation Leisure 1 HQ The family. Marriage. Woman 1 HV Social pathology. Social and public welfare 1 LB Theory and practice of education 1 QA76 Computer software 1