TK Electrical engineering. Electronics Nuclear engineering 14 TA Engineering (General). Civil engineering (General) 13 QA75 Electronic computers. Computer science 6 TP Chemical technology 5 HE Transportation and Communications 4 G70.212-70.215 Geographic information system 3 HD28 Management. Industrial Management 3 QA76 Computer software 3 TD Environmental technology. Sanitary engineering 3 TJ Mechanical engineering and machinery 2 VM Naval architecture. Shipbuilding. Marine engineering 2 3D printing 1 Additive manufacturing 1 Aerospace 1 Aircraft 1 Analysis 1 Autonomous Vehicles (AV) 1 Aviation 1 Binaries 1 CCGT 1 Camera calibration 1 Certification 1 Computer vision 1 Conics 1 Controller Area Network (CAN) 1 Coping 1 Cybersecurity 1 Data acquisition 1 Details in building design and construction.Including walls, roofs 1 ELF 1