QA75 Electronic computers. Computer science QA76 Computer software 14 TK Electrical engineering. Electronics Nuclear engineering 13 HD28 Management. Industrial Management 5 T58.5-58.64 Information technology 5 L Education (General) 4 QA Mathematics 3 T Technology (General) 3 H Social Sciences (General) 2 LB2300 Higher Education 2 Q Science (General) 2 TJ Mechanical engineering and machinery 2 TS Manufactures 2 Computer Science and Information System (Formerly known) 1 G Geography (General) 1 GA Mathematical geography. Cartography 1 HE Transportation and Communications 1 HF Commerce 1 HG Finance 1 LB1501 Primary Education 1 LC Special aspects of education 1 NA Architecture 1 R Medicine (General) 1 SB Plant culture 1 TA Engineering (General). Civil engineering (General) 1 ZA4050 Electronic information resources 1