Digital electronics 1,000 Logic circuits 130 Logic design 90 Design and construction 83 VHDL (Computer hardware description language) 66 Data processing 65 Integrated circuits 57 Computer-aided design 34 Verilog (Computer hardware description language) 31 Digital integrated circuits 29 Electronic circuit design 28 Field programmable gate arrays 26 Microprocessors 26 Electronic circuits 25 Electronic digital computers 24 Electronics 24 Computer simulation 23 Programmable logic devices 23 Circuits 20 Sequential machine theory 18 Analog electronic systems 17 Computer architecture 16 Experiments 15 Very large scale integration 15 Programmable controllers 13 Signal processing 11 Television 11 Testing 11 Application specific integrated circuits 10 Social aspects 10