Electronic digital computers Programming 40 Circuits 30 Design and construction 25 Testing 11 Data processing 10 Integrated circuits 10 Algorithms 9 Electronic data processing 9 Fault-tolerant computing 9 Reliability 9 Logic circuits 8 Very large scale integration 8 Electronic circuits 7 System design 7 Computer software 6 Evaluation 6 Social aspects 6 Logic, Symbolic and mathematical 5 Mathematics 5 Programming languages (Electronic computers) 5 VHDL (Computer hardware description language) 5 Computer networks 4 Computer-assisted instruction 4 Digital electronics 4 Digital integrated circuits 4 Digital techniques 4 History 4 Logic design 4 Machine theory 4