Microcomputers Data processing 125 Maintenance and repair 89 Programming 82 Upgrading 45 Microprocessors 27 Computer-assisted instruction 26 rhagor ... Design and construction 24 Computer interfaces 21 Minicomputers 21 Business 20 Computers 20 Management 19 Automation 16 Certification 16 Computer technicians 16 Amateurs' manuals 15 Computer software 15 Education 13 Electronic data processing 13 Purchasing 13 IBM-compatible computers 12 Study and teaching 12 Computer programs 11 Congresses 11 Equipment and supplies 11 Libraries 11 Handbooks, manuals, etc 10 Library applications 10 Study guides 10 llai ...