Telecommunication Communications Engineering, Networks 1,222 Computer networks  625 Computer Communication Networks 557 Microwaves, RF Engineering and Optical Communications 511 Signal processing 333 Signal, Speech and Image Processing 333 Laser 185 Lasers 185 Electronic Circuits and Systems 180 Electronic circuits 180 Application software 173 Computer and Information Systems Applications 173 Computer Engineering and Networks 153 Computer engineering 153 Electrical and Electronic Engineering 151 Electrical engineering 151 Electronics 145 Electronics and Microelectronics, Instrumentation 145 Control engineering 115 Optical Materials 94 Optical materials 94 Classical Electrodynamics 87 Electrodynamics 87 Information theory 84 Artificial intelligence 83 Artificial Intelligence 81 Software Engineering 80 Software engineering 80 Data and Information Security 71