Design and construction 21 Programmable logic devices 21 Programmable array logic 10 Logic design 9 VHDL (Computer hardware description language) 8 Programmable controllers 6 Logic circuits 5 Raspberry Pi (Computer) 4 Automated guided vehicle systems 2 Automatic programming 2 Materials handling 2 Digital electronics 1 Electronic circuit design 1 Field programmable gate arrays 1 Programmable logic devices - - Design and construction 1