VHDL (Computer hardware description language) 25 Data processing 14 Digital electronics 5 Electronic digital computers 5 Circuits 4 Computer-aided design 4 Design and construction 4 System design 4 Digital integrated circuits 3 Logic design 3 Mathematical models 3 Computer simulation 2 Linear integrated circuits 2 Logic circuits 2 COmputer-aided design 1 Computer systems 1 Design 1 Digital computer simulation 1 Electronic circuit design 1 Field programmable gate arrays 1 Integrated circuits 1 Rapid prototyping 1 Sequential machine theory 1 Simulation methods 1 SystemVerilog (Computer hardware description language) 1 Telecommunication systems 1 Verilog (Computer hardware description language) 1