Operating systems (Computers) Congresses 20 Computer networks 7 Electronic data processing 5 Digital techniques 4 Distributed processing 4 Internet 4 Microcomputers 4 Programming 4 Recording and reproducing 4 Sound 4 Computer software 3 Database management 3 Digital television 3 Handbooks, manuals, etc 3 Multimedia systems 3 Periodicals 3 System design 3 Systems software 3 Client/server computing 2 Computer input-output equipment 2 Computer programming 2 Computer programs 2 Electronic data processing departments 2 Evaluation 2 Macintosh (Computer) 2 Memory management (Computer science) 2 Parallel processing (Electronic computers) 2 Security measures 2 Standards 2