HD28 Management. Industrial Management TA Engineering (General). Civil engineering (General) 12 QA75 Electronic computers. Computer science 5 TH Building construction 4 QA76 Computer software 3 H Social Sciences (General) 2 HF Commerce 2 TJ Mechanical engineering and machinery 2 Computer Science and Information System (Formerly known) 1 HB Economic Theory 1 HD61 Risk Management 1 HE Transportation and Communications 1 HM Sociology 1 HT Communities. Classes. Races 1 JS Local government Municipal government 1 T Technology (General) 1 TE Highway engineering. Roads and pavements 1 TK Electrical engineering. Electronics Nuclear engineering 1