Equipment and supplies 699 Design and construction 100 Computer input-output equipment 96 Electric equipment 93 Electronic equipment 80 Fisheries 74 Automobiles 72 Gehiago ... Maintenance and repair 71 Hardware and Maker 64 Input-output equipment (Computers) 59 Input/Output and Data Communications 59 Buildings 56 Congresses 53 Periodicals 50 Equipment and Supplies 49 Handbooks, manuals, etc 47 Industrial equipment 43 Mechanical equipment 38 Audio-visual equipment 35 Farm equipment 35 Computer Hardware 33 Computer hardware 33 Computer Communication Networks 31 Computer communication systems 31 Telecommunication 31 Medical instruments and apparatus 30 Construction equipment 27 Purification 27 Software engineering 27 Sound 27 gutxiago ...